chromaticity

[kroh-muh-tis-i-tee] /ˌkroʊ məˈtɪs ɪ ti/
noun, Optics.
1.
the quality of a color as determined by its dominant wavelength and its purity.
Origin
1900-05; chromatic + -ity
British Dictionary definitions for chromaticity

chromaticity

/ˌkrəʊməˈtɪsɪtɪ/
noun
1.
the quality of a colour or light with reference to its purity and its dominant wavelength