RGB Colour Picker: Cyan to Blue – Values

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Description

RGB Colour Picker: Cyan to Blue

TRY SOME QUICK QUESTIONS AND ANSWERS TO GET STARTED
RGB is a colour model used to produce a full palette of colours by mixing red, green and blue light sources in different proportions.
RGB refers to the colours red, green and blue. These are the primary colours used by the RGB colour model to mix wavelengths of light to produce a palette of as many as 16 million colours.
_x000D_ _x000D_ Red, green and blue are the three primary colours in the RGB colour model.

About the diagram

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)

Understanding the diagram

  • All the colours in this diagram have been produced by mixing different proportion of green and blue light. The third primary colour, red, is always off.
  • The block of colour swatches is made up of 16 rows and 16 columns.
  • The first swatch at the top left shows cyan which is a secondary colour with its code 00, 255, 255.
  • The last swatch at the bottom right shows blue which is a primary colour with its code 00, 00, 255.
  • To make sense of RGB colours and codes it helps to understand how RGB colour notation works:
  • When mixing any RGB colour, three numbers (separated by commas) show how much red, green and blue light is to be used.
  • The minimum value for each light source is 0. In this case the light is fully off.
  • The maximum value for each light source is 255. In this case the light source is fully on.
  • As each number increases so does the intensity of the corresponding light but the wavelength, and so the colour we see, stays the same.
RGB colour values
Light source Red Green Blue
Maximum value for each light source (fully on) 255 , 255 , 255
Values between 0 and 255 1 to 254 1 to 254 1 to 254
Minimum value for each light source (fully off) 0 , 0 , 0

RGB colour values

Now let’s look at RGB colour values in detail

RGB colour values are represented by decimal triplets (base 10) or hexadecimal triplets (base 16). These triplets are used in software and apps to select a colour.

  • In decimal notation, an RGB triplet is used to represent the values of red, then green, then blue.
  • Decimal numbers between 0 and 255 are selected for each value:
  • Red = 255, 00, 00
  • Yellow = 255, 255, 00
  • Green = 00, 255, 00
  • Cyan = 00, 255, 255
  • Blue = 00, 00, 255
  • Magenta = 255, 00, 255
  • In hexadecimal notation, an RGB triplet is used to represent the value of red, then green, then blue.
  • Hexadecimal numbers between 00 and FF are selected for each value.
  • The hash symbol (#) is used to indicate hex notation:
  • Red = #FF0000
  • Yellow = #FFFF00
  • Green = #00FF00
  • Cyan = 00FFFF
  • Blue = #0000FF
  • Magenta = #FF00FF
  • The sequence of hexadecimal values between 1 and 16 are: 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E and F.
  • The sequence of hexadecimal values between 17 and 32 are: 10,11,12,13,14,15,16,17,18,19,1A,1B,1C,1D,1E and 1F.

Some key terms

Primary colour

Primary colours are a set of colours from which others can be produced by mixing (pigments, dyes etc.) or overlapping ...

RGB colour

To be clear about RGB colour it is useful to remember first that: The visible spectrum is the range of ...

Colour

Things appear coloured to an observer because colour corresponds with a property of light that is visible to the human ...

What is the trichromatic colour model?

The trichromatic colour model is a theory of colour that establishes terms, rules and methods to enable human colour vision ...

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