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The color quality of light that can be defined by its chromaticity coordinates; depends only on hue and saturation of a color, and not on its luminance (brightness).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The color quality of light definable by its dominant (or complementary) wavelength and its purity, taken together.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
hueThe dominant wavelength of a color. Also known as "chromaticity." A color system (color space, color model) measures color by hue, saturation and luminance. The hue is the predominant color, the saturation is the color intensity (from white to pure color), and the luminance is the brightness (from light to dark). See color space, HSB, HSL and CIE Lab.
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