Digital Colour Theory. What is colour theory? It is the theory behind colour mixing and colour combination.

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Presentation transcript:

Digital Colour Theory

What is colour theory? It is the theory behind colour mixing and colour combination.

CMYK Colour Model For printers Subtractive colour model Composite Black Process Black

RGB Colour Model For screens Additive colour model

RGB in Digital Imaging The colour of each pixel in a digital image is made up of RGB

Example of a True Colour Image Bit-depth = 24-bits – 8-bits > Red – 8-bits > Green – 8-bits > Blue

Example of a True Colour Image 8 bits = 256 colours – 256 Red intensities – 256 Green intensities – 256 Blue intensities

Example of a True Colour Image 256 x 256 x 256 = 16.7 million colours

How do we numerically represent RGB colours?

What is hexadecimal? Decimal: Base-10 – Binary: Base-2 – 01 Hexadecimal: Base-16 – ABCDEF

#FF0000

Why we use hexadecimal? It is more user friendly when compared to binary. Example of the colour Red FF 00 00

What is HSB?

What is a Colour Gamut?

What is Gamut Conversion?