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Colour by Subtraction

Colour by Subtraction. Complementary Colours. Primary colours of pigment. The primary colours of pigment are: Cyan Magenta Yellow. Complementary Colours. Colours formed by mixtures of pigments are called subtractive colours . When complementary colours are combined, they make black .

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Colour by Subtraction

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  1. Colour by Subtraction Complementary Colours

  2. Primary colours of pigment • The primary colours of pigment are: • Cyan • Magenta • Yellow

  3. Complementary Colours • Colours formed by mixtures of pigments are called subtractive colours. • When complementary colours are combined, they make black. • We see the colour black when no colour of light (RGB) is reflected into our eyes.

  4. Complementary Colours • Mixtures of pigments (to make black): • red + cyan black • red + (green + blue)  black • green + magenta black • green + (red + blue)  black • blue + yellow black • blue + (red + green)  black

  5. TEST Yourself !! • What are the 3 primary colours of light? • What are the 3 primary colours of pigment? • What are the 3 secondary colours of light? • What are the 3 secondary colours of pigment?

  6. TEST Yourself !! • What colours of light are reflected when we see white? • What colours of light are reflected when we see black? • If a yellow light shines on a blue book, then what colour will the book appear to be? Draw a diagram to go with it. • If a magenta light shines on a blue book, then what colour will the book appear to be? Draw a diagram to go with it.

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