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Related to chromaticity: chromaticity coordinates, chromaticity diagram
The aspect of color that includes consideration of its dominant wavelength and purity.
(General Physics) the quality of a colour or light with reference to its purity and its dominant wavelength
chro•ma•tic•i•ty(ˌkroʊ məˈtɪs ɪ ti)
the quality of a color as determined by its dominant wavelength and its purity.