purple vs chromatic color

purple and chromatic color both are nouns.

Word	Noun	Adjective	Verb	Adverb
purple	Yes	Yes	Yes	No
chromatic color	Yes	No	No	No

As nouns, chromatic color is a hypernym of purple; that is, chromatic color is a word with a broader meaning than purple:

Other hypernyms of purple include chromatic colour, spectral color, spectral colour.

purple (noun)	chromatic color (noun)
(Roman Catholic Church) official dress of a cardinal; so named after the Tyrial purple color of the robes	a color that has hue
a color between red and blue
(in ancient Rome) position of imperial status

purple (adjective)	chromatic color (adjective)
of a color intermediate between red and blue
belonging to or befitting a supreme ruler
excessively elaborate or showily expressed

purple (verb)	chromatic color (verb)
color purple
become purple