The quality of colour or light in terms of the purity of its dominant wavelength, involving both hue and saturation (1). The chromaticity coordinates of a colour are the three tristimulus values, symbolized by x, y, and z, representing the proportions of the three additive primaries that when mixed match the given colour. Also called chromaticness. See also primary colour (1, 2, 3).
Subjects: Physics — Psychology.