Xerox Fiery color server, User Manual

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A
A-4 Desktop Color Primer
Purple colors, which do not exist in the spectrum of pure light, are found at the
bottom of the diagram. Purples are mixtures of red and blue light—the opposite ends
of the spectrum.
Hue, saturation, and brightness
A color can be described in terms of three varying characteristics, called the HSB
color model:
• Hue—tint (the qualitative aspect of a color—red, green, or orange)
• Saturation—the purity of the color
• Brightness—relative position between white and black
While the CIE chromaticity diagram shown earlier conveys hue and saturation,
a three-dimensional color model is required to add the brightness component, as
shown in the following figure.
Brightness
Saturation
Hue