RGB Colour Model – Saturation

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Description

RGB Colour Model - Saturation

TRY SOME QUICK QUESTIONS AND ANSWERS TO GET STARTED
What are the three primary colours in the RGB colour model?
Red, green and blue are the three primary colours in the RGB colour model.
What do the letters RGB refer to?
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.
What are the two primary colours of light that together make cyan?
In the RGB colour model green and blue are the two primary colours that together make cyan!
What is the RGB colour model?
RGB is a colour model used to produce a full palette of colours by mixing red, green and blue light sources in different proportions.

About the diagram

Some key terms

RGB colour model

RGB colour is an additive colour model in which red, green and blue light is combined to reproduce a wide range of other colours.

  • The primary colours in the RGB colour model are red, green and blue.
  • In the RGB model, different combinations and intensities of red, green, and blue light are mixed to create various colours. When these three colours are combined at full intensity, they produce white light.
  • Additive colour models are concerned with mixing light, not dyes, inks or pigments (these rely on subtractive colour models such as the RYB colour model and the CMY colour model).
  • The RGB colour model works in practice by asking three questions of any colour: how red is it (R), how green is it (G), and how blue is it (B).
  • The RGB model is popular because it can easily produce a comprehensive palette of 1530 vivid hues simply by adjusting the combination and amount of each of the three primaries it contains.
Saturation

Saturation refers to the perceived difference between one colour and another in terms of its purity and vividness.

  • A fully saturated colour appears bright and vibrant because it has a single strong dominant hue.
  • A freshly cut tomato is a good example of a saturated colour with a strong red hue.
  • A saturated colour is a unique spectral colour produced by a single wavelength (or a narrow band of wavelengths) of light.
  • A fully saturated colour (100%) is the purest version of a hue.
  • Unsaturated colours (0-10%) can appear:
    • Misty or milky the nearer they are to white.
    • Dull and washed out as their hue disappears leaving achromatic grey tones.
  • The hue of a vivid colour appears to be at full strength and can leave an after-image of its complementary colour as an observer looks away.

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