A
A-91 The properties of color
ES3640e MFP Color Reference Guide - 91
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
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
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