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RGB Colour Wheel with 3 Colours

RGB Colour Wheel with 3 Colours

This is one of a series of diagrams exploring RGB colour wheels. Colour wheels demonstrate or simulate the effect of colour mixing.
Colour wheels can be used to explore the effect of mixing any type of colour. Light, inks, dyes, artist's paints, pigments and colourants all produce other colours when mixed together. Whilst a colour model outlines a method for mixing and using different types of colour, a colour wheel explores what happens in practice ...
Refraction of Light Away from the Normal

Refraction of Light Away from the Normal

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Refraction of Light Towards the Normal

Refraction of Light Towards the Normal

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Spectral Colour Model

Spectral Colour Model

This diagram introduces the spectral colour model. Spectral colours are the colours of the visible spectrum.
Spectral colours are evoked by a single wavelength of light in the visible spectrum. So, very wavelength of visible light is perceived as a spectral colour by a human observer. The spectral colour model explains why different light sources produce different experiences of colour for an observer. What you need to remember:
  • A diagram of spectral colour is usually presented in the form of a continuous linear spectrum organised by wavelength, with red at one end and violet at the other.
  • The ...
Facts about the Sun

Facts about the Sun

This diagram introduces the Sun, the star at the centre of our solar system. It lists some useful facts that help explain why it is so important in our lives.
Remember that:
  • The sun is unlike anything else in our experience. Its age, size, temperature are all on a scale apart from life on planet Earth.
  • It explodes with the force of a billion one-megaton nuclear bombs every single second of every single day.
  • Without the energy produced by the sun, life as we know it would not be possible.
...
Greyscale: Wedges

Greyscale: Wedges

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1530 RGB Colours

1530 RGB Colours

This diagram shows all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
The diagram splits the total of 1530 into blocks of 256 colours with each block starting with a primary and finishing with a secondary colour or visa-vera. The six segments are:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
RGB Colour Picker: Magenta to Red

RGB Colour Picker: Magenta to Red

This is one of a series of six colour pickers that together show all 1530 fully saturated RGB colours along with their codes. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
256 RGB Colours Between Magenta and Red

256 RGB Colours Between Magenta and Red

This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
256 RGB Colours Between Magenta and RedEach diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
RGB Colour Picker: Blue to Magenta

RGB Colour Picker: Blue to Magenta

This is one of a series of six colour pickers that together show all 1530 fully saturated RGB colours along with their codes. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
256 RGB Colours Between Blue and Magenta

256 RGB Colours Between Blue and Magenta

This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
RGB Colour Picker: Cyan to Blue

RGB Colour Picker: Cyan to Blue

This is one of a series of six colour pickers that together show all 1530 fully saturated RGB colours along with their codes. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
256 RGB Colours Between Cyan and Blue

256 RGB Colours Between Cyan and Blue

This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
RGB Colour Picker: Green to Cyan

RGB Colour Picker: Green to Cyan

This is one of a series of six colour pickers that together show all 1530 fully saturated RGB colours along with their codes. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
256 RGB Colours Between Green and Cyan

256 RGB Colours Between Green and Cyan

This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
RGB Colour Picker: Yellow to Green

RGB Colour Picker: Yellow to Green

This is one of a series of six colour pickers that together show all 1530 fully saturated RGB colours along with their codes. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
256 RGB Colours Between Yellow and Green

256 RGB Colours Between Yellow and Green

This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
RGB Colour Picker: Red to Yellow

RGB Colour Picker: Red to Yellow

This is one of a series of six colour pickers that together show all 1530 fully saturated RGB colours along with their codes. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
256 RGB Colours Between Red and Yellow

256 RGB Colours Between Red and Yellow

This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
1530 RGB Colours

1530 RGB Colours

This diagram shows all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
The diagram splits the total of 1530 into blocks of 256 colours with each block starting with a primary and finishing with a secondary colour or visa-vera. The six segments are:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
256 RGB Colours: Magenta to Red

256 RGB Colours: Magenta to Red

This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
256 RGB Colours: Blue to Magenta

256 RGB Colours: Blue to Magenta

This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
256 RGB Colours: Cyan to Blue

256 RGB Colours: Cyan to Blue

This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
256 RGB Colours: Green to Cyan

256 RGB Colours: Green to Cyan

This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
256 RGB Colours: Yellow to Green

256 RGB Colours: Yellow to Green

This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
256 RGB Colours: Red to Yellow

256 RGB Colours: Red to Yellow

This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model. Fully saturated colours are produced by mixing two primary colours together.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-vera:
  • Red (primary colour) to yellow (secondary colour)
  • Yellow (secondary) to green (primary)
  • Green (primary) to cyan (secondary)
  • Cyan (secondary) to blue (primary)
  • Blue (primary) to magenta (secondary)
  • Magenta (secondary) to red (primary)
...
Greyscale: Disks

Greyscale: Disks

This diagram is a new addition to the site! More information will be added ASAP 🙂 ...
Greyscale: Disks

Greyscale: Disks

This diagram is a new addition to the site! More information will be added ASAP 🙂 ...
HSB Colour Model: Wedges

HSB Colour Model: Wedges

This diagram is a new addition to the site! More information will be added ASAP 🙂 ...
HSB Colour Model: Wedges

HSB Colour Model: Wedges

This diagram is a new addition to the site! More information will be added ASAP 🙂 ...
HSB Colour Model: Disks

HSB Colour Model: Disks

This diagram is a new addition to the site! More information will be added ASAP 🙂

...
HSB Colour Model: Disks

HSB Colour Model: Disks

This diagram is a new addition to the site! More information will be added ASAP 🙂

...
Mixing RGB Primary Colours

Mixing RGB Primary Colours

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Mixing RGB Primary Colours

Mixing RGB Primary Colours

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Mixing Primary Colours in Different Proportions

Mixing Primary Colours in Different Proportions

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Adding Colours Between RGB Primaries

Adding Colours Between RGB Primaries

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Colours Between RGB Primaries

Colours Between RGB Primaries

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RGB Colour Wheels with 3 to 102 Colours

RGB Colour Wheels with 3 to 102 Colours

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Hue and Greyscale

Hue and Greyscale

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RGB and HSB Colour Values

RGB and HSB Colour Values

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HSB Colour Model: Hue and Brightness

HSB Colour Model: Hue and Brightness

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HSB Colour Model: Hue and Saturation

HSB Colour Model: Hue and Saturation

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HSB Colour Model: Hue and Brightness

HSB Colour Model: Hue and Brightness

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HSB Colour Model: Hue and Saturation

HSB Colour Model: Hue and Saturation

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RGB and HSB Colour Values

RGB and HSB Colour Values

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RGB Colour Model: Saturation

RGB Colour Model: Saturation

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Saturation in Sunlight

Saturation in Sunlight

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HSB Colour Model: Hue, Saturation and Brightness

HSB Colour Model: Hue, Saturation and Brightness

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Making Spectral Colour using the RGB Colour Model

Making Spectral Colour using the RGB Colour Model

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Spectral Colour

Spectral Colour

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Human Eye Eyeball and Retina

Human Eye Eyeball and Retina

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Retina of the Human Eye in Detail

Retina of the Human Eye in Detail

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Human Eye in Cross Section

Human Eye in Cross Section

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How to See a Rainbow

How to See a Rainbow

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Paths of Red Green and Blue Rays in a Raindrop

Paths of Red Green and Blue Rays in a Raindrop

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RYB Subtractive Colour Model

RYB Subtractive Colour Model

This diagram introduces the RYB colour model. It shows the three primary colours (red, yellow and blue) with secondary colours between them.
The RYB colour model is a subtractive colour model that predicts the appearance of red, yellow and blue paints and opaque pigments when they are mixed together to produce other colours. What you need to remember:
  • The RYB colour model is a method for mixing different artists paints and opaque pigments to produce other colours. It is called a subtractive colour model (a subtractive approach to colour).
  • The name of the RYB colour model comes from ...
CMY Subtractive Colour Model

CMY Subtractive Colour Model

This diagram introduces the CMY colour model. It shows the three primary colours (cyan, magenta and blue) with secondary colours between them.
The CMY colour model is a subtractive colour model that predicts the appearance of cyan, magenta and yellow inks when they are mixed together to produce other colours. What you need to remember:
  • The CMY colour model is a method for mixing inks used by digital printers to produce other colours. It is called a subtractive colour model (a subtractive approach to colour).
  • The name of the CMY colour model comes from the initials of its ...
RGB Additive Colour Model

RGB Additive Colour Model

This diagram introduces the RGB colour model. It shows the three primary colours (red, green and blue) with secondary colours between them. What you need to remember:
  • Mixing different wavelengths of light to produce other colours, is called an additive colour model or an additive approach to colour.
  • Red, green and blue (RGB) are additive primary colours. This means that when these wavelengths of light are projected onto a dark surface they combined to produce other colours. The colour produced depends on the intensity of each light source.
  • If wavelengths of light corresponding with all three additive primary ...
Using RGB Colour to Mix Wavelengths of Light

Using RGB Colour to Mix Wavelengths of Light

This diagram explores the RGB colour model. It looks at how wavelengths of light corresponding with the RGB primary colours are combined to produce secondary colours.
What you need to remember:
  • Mixing different wavelengths of light to produce other colours, is called an additive colour model or an additive approach to colour.
  • Red, green and blue (RGB) are additive primary colours. This means that when these wavelengths of light are projected onto a dark surface they combined to produce other colours.
  • If wavelengths of light corresponding with all three additive primary colours are projected in equal amounts onto ...
Sensitivity of Eye to the Colour Spectrum (svg) 11000-0-A-BL-EN

Sensitivity of Eye to the Colour Spectrum

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...
Response of the Cone Cells in the Human Eye to Colour (svg) 11010-0-A-BL-EN

Response of the Cone Cells in the Human Eye to Colour

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Refraction, Reflection and Total Internal Reflection

Refraction, Reflection and Total Internal Reflection

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Sunlight Reflects off a Fish in Water

Sunlight Reflects off a Fish in Water

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Wavelength, Frequency and Energy Compared

Wavelength, Frequency and Energy Compared

This diagram of the electromagnetic spectrum shows how wavelength, frequency and energy are related to one another.
  • The diagram shows that the electromagnetic spectrum can be described as bands of electromagnetic radiation. Radio waves which have the longest wavelengths and the lowest frequency appear at the top of the diagram whilst gamma rays which have the shortest wavelengths but the highest frequencies appear at the bottom.
  • A magnified view of the visible spectrum is shown on the left of the diagram. It forms a very small band of wavelengths, frequencies and energies within the electromagnetic spectrum as a whole.
  • ...
Electromagnetic spectrum

Electromagnetic spectrum

This diagram shows that the electromagnetic spectrum includes waves with all possible wavelengths, ranging from low energy radio waves through visible light to high energy gamma rays.
  • Notice that a wave with a longer wavelength has a lower frequency and carries less energy.
  • Notice that a wave with a shorter wavelength has a higher frequency and carries more energy.
Remember that:
  • The electromagnetic spectrum includes, in order of increasing frequency and decreasing wavelength: radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.
  • There are no precisely defined boundaries between the bands of electromagnetic ...
Calculating the Frequency of Electromagnetic Waves

Calculating the Frequency of Electromagnetic Waves

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RGB Colour Wheel with 196 Colours

RGB Colour Wheel with 196 Colours

This is one of a series of diagrams exploring RGB colour wheels. Colour wheels demonstrate or simulate the effect of colour mixing.
Colour wheels can be used to explore the effect of mixing any type of colour. Light, inks, dyes, artist's paints, pigments and colourants all produce other colours when mixed together. Whilst a colour model outlines a method for mixing and using different types of colour, a colour wheel explores what happens in practice ...
RGB Colour Wheel with 196 Colours

RGB Colour Wheel with 196 Colours

This is one of a series of diagrams exploring RGB colour wheels. Colour wheels demonstrate or simulate the effect of colour mixing.
Colour wheels can be used to explore the effect of mixing any type of colour. Light, inks, dyes, artist's paints, pigments and colourants all produce other colours when mixed together. Whilst a colour model outlines a method for mixing and using different types of colour, a colour wheel explores what happens in practice ...
Colour-Wheel-with-102-Colours (svg) 05300-3-A-BL-EN-RGB

RGB Colour Wheel with 102 Colours

This is one of a series of diagrams exploring RGB colour wheels. Colour wheels demonstrate or simulate the effect of colour mixing.
Colour wheels can be used to explore the effect of mixing any type of colour. Light, inks, dyes, artist's paints, pigments and colourants all produce other colours when mixed together. Whilst a colour model outlines a method for mixing and using different types of colour, a colour wheel explores what happens in practice ...
RGB Colour Wheel with 102 Colours

RGB Colour Wheel with 102 Colours

This is one of a series of diagrams exploring RGB colour wheels. Colour wheels demonstrate or simulate the effect of colour mixing.
Colour wheels can be used to explore the effect of mixing any type of colour. Light, inks, dyes, artist's paints, pigments and colourants all produce other colours when mixed together. Whilst a colour model outlines a method for mixing and using different types of colour, a colour wheel explores what happens in practice ...
RGB Colour Wheel with 30 Colours

RGB Colour Wheel with 30 Colours

This is one of a series of diagrams exploring RGB colour wheels. Colour wheels demonstrate or simulate the effect of colour mixing.
Colour wheels can be used to explore the effect of mixing any type of colour. Light, inks, dyes, artist's paints, pigments and colourants all produce other colours when mixed together. Whilst a colour model outlines a method for mixing and using different types of colour, a colour wheel explores what happens in practice ...
RGB Colour Wheel with 30 Colours

RGB Colour Wheel with 30 Colours

This is one of a series of diagrams exploring RGB colour wheels. Colour wheels demonstrate or simulate the effect of colour mixing.
Colour wheels can be used to explore the effect of mixing any type of colour. Light, inks, dyes, artist's paints, pigments and colourants all produce other colours when mixed together. Whilst a colour model outlines a method for mixing and using different types of colour, a colour wheel explores what happens in practice ...
RGB Colour Wheel with 18 Colours

RGB Colour Wheel with 18 Colours

This is one of a series of diagrams exploring RGB colour wheels. Colour wheels demonstrate or simulate the effect of colour mixing.
Colour wheels can be used to explore the effect of mixing any type of colour. Light, inks, dyes, artist's paints, pigments and colourants all produce other colours when mixed together. Whilst a colour model outlines a method for mixing and using different types of colour, a colour wheel explores what happens in practice ...
RGB Colour Wheel with 18 Colours

RGB Colour Wheel with 18 Colours

This is one of a series of diagrams exploring RGB colour wheels. Colour wheels demonstrate or simulate the effect of colour mixing.
Colour wheels can be used to explore the effect of mixing any type of colour. Light, inks, dyes, artist's paints, pigments and colourants all produce other colours when mixed together. Whilst a colour model outlines a method for mixing and using different types of colour, a colour wheel explores what happens in practice ...
RGB Colour Wheel with 6 Colours

RGB Colour Wheel with 6 Colours

This is one of a series of diagrams exploring RGB colour wheels. Colour wheels demonstrate or simulate the effect of colour mixing.
Colour wheels can be used to explore the effect of mixing any type of colour. Light, inks, dyes, artist's paints, pigments and colourants all produce other colours when mixed together. Whilst a colour model outlines a method for mixing and using different types of colour, a colour wheel explores what happens in practice ...
RGB Colour Wheel with 6 Colours

RGB Colour Wheel with 6 Colours

This is one of a series of diagrams exploring RGB colour wheels. Colour wheels demonstrate or simulate the effect of colour mixing.
Colour wheels can be used to explore the effect of mixing any type of colour. Light, inks, dyes, artist's paints, pigments and colourants all produce other colours when mixed together. Whilst a colour model outlines a method for mixing and using different types of colour, a colour wheel explores what happens in practice ...
RGB Colour Wheel with 3 Colours

RGB Colour Wheel with 3 Colours

This is one of a series of diagrams exploring RGB colour wheels. Colour wheels demonstrate or simulate the effect of colour mixing.
Colour wheels can be used to explore the effect of mixing any type of colour. Light, inks, dyes, artist's paints, pigments and colourants all produce other colours when mixed together. Whilst a colour model outlines a method for mixing and using different types of colour, a colour wheel explores what happens in practice ...
Adding RGB Colours between Primaries

Adding RGB Colours between Primaries

This diagram is brand new! A full explanation will be added ASAP 🙂

...
Overlapping Beams of Cyan, Magenta and Yellow

Overlapping Beams of Cyan, Magenta and Yellow

This diagram shows the effect of projecting cyan, magenta and yellow light onto a neutral coloured surface.
  • In the RGB colour model, cyan, magenta and yellow are secondary colours. Notice what colours are produced where they overlap!
  • Imagine that the three circles of colour (cyan, magenta and yellow) are produced by torches shining beams of light so they overlap one another.
  • Overlapping pairs of primary colours produce secondary colours.
  • But in this diagram overlapping pairs of secondary colours produce primary colours
  • The area where all three primary colours overlap is white.
Understanding the diagram
  • The diagrams illustrate ...
Combining Different Wavelengths of Light to make White

Combining Different Wavelengths of Light to make White

This diagram looks at three situations in which an observer will see white light reflected off a dark surface.
Three different light sources are shown in the diagram.
  • Each light source produces a different combination of wavelengths and each wavelength has the same intensity.
  • The light source at the top of the diagram contains three component colours: RGB (red, green, blue).
  • The light source on the left contains six component colours - ROYGBV (red, orange, yellow, green, blue and violet).
  • The light source on the right contains a continuous spectrum of wavelengths which means it contains many thousands ...
Wavelength and Speed of Light in Different Materials

Wavelength and Speed of Light in Different Materials

This diagram shows the waveform of rays of red light (electromagnetic radiation) travelling through equally sized blocks of different transparent materials.
  • The top block contains a vacuum so the speed of light, the wavelength and the distance travelled are all shown to be 100%.
  • The diagram then illustrates the relative speed, wavelength and distance travelled as light passes through each of the other materials.
  • The speed of light in a vacuum is 299,792 kilometres per second. Different media reduce that speed by different amounts depending on their optical density.
    • Optically rare medium (air) = a faster medium  = ...
Why an Object Appears Red in Sunlight

Why an Object Appears Red in Sunlight

This is one of a set of 10 diagrams exploring why objects appear to be different colours to an observer.
There are always three key factors that affect the colour of an object.
  • The first is the type of light source and what happens to the light on its journey towards an object.
  • The second is what happens when light strikes different types of objects and materials.
  • The third concerns factors related to the observer which affect what they see and how things appear.
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Refraction and Dispersion of Wavelengths of Light

Refraction and Dispersion of Wavelengths of Light

This diagram is brand new! A full explanation will be added ASAP 🙂

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Why an Object Appears Transparent in Sunlight

Why an Object Appears Transparent in Sunlight

This is one of a set of 10 diagrams exploring why objects appear to be different colours to an observer.
There are always three key factors that affect the colour of an object.
  • The first is the type of light source and what happens to the light on its journey towards an object.
  • The second is what happens when light strikes different types of objects and materials.
  • The third concerns factors related to the observer which affect what they see and how things appear.
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Why an Object Appears Cyan in Sunlight

Why an Object Appears Cyan in Sunlight

This is one of a set of 10 diagrams exploring why objects appear to be different colours to an observer.
There are always three key factors that affect the colour of an object.
  • The first is the type of light source and what happens to the light on its journey towards an object.
  • The second is what happens when light strikes different types of objects and materials.
  • The third concerns factors related to the observer which affect what they see and how things appear.
...
Why an Object Appears Yellow in Sunlight

Why an Object Appears Yellow in Sunlight

This is one of a set of 10 diagrams exploring why objects appear to be different colours to an observer.
There are always three key factors that affect the colour of an object.
  • The first is the type of light source and what happens to the light on its journey towards an object.
  • The second is what happens when light strikes different types of objects and materials.
  • The third concerns factors related to the observer which affect what they see and how things appear.
...
Why an Object Appears Violet in Sunlight

Why an Object Appears Violet in Sunlight

This is one of a set of 10 diagrams exploring why objects appear to be different colours to an observer.
There are always three key factors that affect the colour of an object.
  • The first is the type of light source and what happens to the light on its journey towards an object.
  • The second is what happens when light strikes different types of objects and materials.
  • The third concerns factors related to the observer which affect what they see and how things appear.
...
Why an Object Appears Blue in Sunlight

Why an Object Appears Blue in Sunlight

This is one of a set of 10 diagrams exploring why objects appear to be different colours to an observer.
There are always three key factors that affect the colour of an object.
  • The first is the type of light source and what happens to the light on its journey towards an object.
  • The second is what happens when light strikes different types of objects and materials.
  • The third concerns factors related to the observer which affect what they see and how things appear.
...
Why-an-Object-Appears-Green-in-Sunlight (svg) 02000-0-A-BL-EN

Why an Object Appears Green in Sunlight

This is one of a set of 10 diagrams exploring why objects appear to be different colours to an observer.
There are always three key factors that affect the colour of an object.
  • The first is the type of light source and what happens to the light on its journey towards an object.
  • The second is what happens when light strikes different types of objects and materials.
  • The third concerns factors related to the observer which affect what they see and how things appear.
...
Why an Object Appears Orange in Sunlight

Why an Object Appears Orange in Sunlight

This is one of a set of 10 diagrams exploring why objects appear to be different colours to an observer.
There are always three key factors that affect the colour of an object.
  • The first is the type of light source and what happens to the light on its journey towards an object.
  • The second is what happens when light strikes different types of objects and materials.
  • The third concerns factors related to the observer which affect what they see and how things appear.
...
Why an Object Appears White in Sunlight

Why an Object Appears White in Sunlight

This is one of a set of 10 diagrams exploring why objects appear to be different colours to an observer.
There are always three key factors that affect the colour of an object.
  • The first is the type of light source and what happens to the light on its journey towards an object.
  • The second is what happens when light strikes different types of objects and materials.
  • The third concerns factors related to the observer which affect what they see and how things appear.
...
Long Waves to Short Waves

Long Waves to Short Waves

This diagram shows six electromagnetic waves. Each wave corresponds with a colour within the visible spectrum that an observer might recognise.
Remember that:
  • Electromagnetic waves, which are a form of electromagnetic radiation, propagating from a light source, travel through space and encounter different materials.
  • Colour is not a property of electromagnetic radiation, but an aspect of visual perception.
  • A human observer can distinguish between colours corresponding with many thousands of wavelengths of light in the visible spectrum. These colours are often called spectral colours.
  • The largest part of the electromagnetic spectrum is outside the wavelengths of visible light ...
Electric and Magnetic Properties of Light

Electric and Magnetic Properties of Light

This diagram shows that an electromagnetic wave (lightwave) results from the interaction of an electric and magnetic field.
  • Electromagnetic waves are produced by the Sun as a result of thermonuclear fusion.
  • The explosive force of thermonuclear fusion is caused by gravity crushing hydrogen atoms until they collapse.
  • The nuclear reaction forces hydrogen atoms to combine into helium atoms and release vast amounts of electrical and magnetic energy.
  • The electrical and magnetic forces form fields which interact with each other to produce a wave pattern that radiates out into space at the speed of light.
  • The electromagnetic waves are of ...
Actual and Observed Position of an Object in Water

Actual and Observed Position of an Object in Water

This diagram is a new addition to the site! More information will be added ASAP 🙂 ...
Refraction of a Ray of Red Light

Refraction of a Ray of Red Light

This diagram is a new addition to the site! More information will be added ASAP 🙂 ...
Refraction and Dispersion of a Ray of White Light

Refraction and Dispersion of a Ray of White Light

This diagram is a new addition to the site! More information will be added ASAP 🙂 ...
Prism Splits a Ray of Light into Spectral Colours (svg) 06700-0-A-BL-EN

Prism Splits a Ray of Light into Spectral Colours

This diagram is a new addition to the site! More information will be added ASAP 🙂 ...
How to Use the Refractive Index of a Medium

How to Use the Refractive Index of a Medium

This diagram is a new addition to the site! More information will be added ASAP 🙂

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Ray of Light Strikes a Surface at a Right Angle

Ray of Light Strikes a Surface at a Right Angle

This diagram is a new addition to the site! More information will be added ASAP 🙂 ...
Light strikes Curved Surface in Line with the Normal

Light strikes Curved Surface in Line with the Normal

This diagram is a new addition to the site! More information will be added ASAP 🙂 ...
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