chromatic colour vs spectral color

chromatic colour and spectral color both are nouns.

Word	Noun	Adjective	Verb	Adverb
chromatic colour	Yes	No	No	No
spectral color	Yes	No	No	No

As nouns, chromatic colour and spectral color are synonyms defined as:

Other synonyms of chromatic colour include chromatic color, spectral colour.

chromatic colour (noun)	spectral color (noun)
a color that has hue	a color that has hue