dominant wavelength (of a color stimulus)

[4.7]

(λ_d)

Wavelength of the monochromatic stimulus that, when additively mixed in suitable proportions with the specified achromatic stimulus, matches the color stimulus considered in the CIE 1931 x, y chromaticity diagram.

Note: In the case of a purple stimulus, the dominant wavelength is replaced by the complementary wavelength.

Source: International Commission on Illumination (CIE). CIE S 017:2011,ILV: International Lighting Vocabulary. Vienna: CIE; 2011.