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The hue (also hue , hue , color direction , English hue ) is a color characteristic . In addition to brightness and color saturation , hue is one of the three characteristics or properties of a color that people perceive to be fundamental .

In color theory, the hue describes the property according to which color sensations are differentiated into, for example, red , yellow or green . A color of the same hue can either vary in color saturation, such as gray- blue versus blue , or in brightness, e.g. pink versus red .

A color can be clearly described by specifying these three properties; they span a three-dimensional space , the so-called HSV color space , other coordinates are used for other color spaces . The basic existence of a hue distinguishes chromatic colors from achromatic colors : The color value assigned to the hue is therefore also called hue , and is typically specified as the hue angle .

The hue can only be approximated by the wavelength of the monochromatic light of a hue; for colors of the purple line , the complementary wavelength is often indicated in the color wheel opposite. The only important factor for the color valence is the ratio of the irritation of the individual color receptors in the eye, which can be changed, among other things, by adapting to the surrounding light conditions and by the sum of the neighboring color stimuli in the viewer's field of vision.

Colors can also be precisely defined using the components of certain basic colors. With additive color mixing these are red, green and blue (RGB), with subtractive color mixing cyan , magenta and yellow (cyan, magenta, yellow = CMY). For colorimetric applications , these are the theoretical colors X, Y and Z.

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Wiktionary: hue  - explanations of meanings, word origins, synonyms, translations