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Colour conversion

Colours can be represented in different ways, with different notations or with different combinations of colours. Some methods are shown below.
Note that some conversions, for example CMYK -> RGB, are not standard en are in principle device specific and are done by colour management systems. Conversions on different systems can differ.

Hexadecimal RGB CMY CMYK
Red: Cyan: % Cyan: %
Green: Magenta: % Magenta: %
Blue: Yellow: % Yellow: %
Key (Black): %
HSL HSB (HSV) HSI
Hue: ° Hue: ° Hue: °
Saturation: % Saturation: % Saturation: %
Lightness: % Brightness: % Intensity: %
YIQ YUV YCbCr
Luma (Y): % Luma (Y): % Luma (Y): %
Chrominance I: % Chrominance U: % Chrominance Cb: %
Chrominance Q: % Chrominance V: % Chrominance Cr: %
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