caramel brown vs chromatic

caramel brown is a noun but chromatic is not a noun.

Word	Noun	Adjective	Verb	Adverb
caramel brown	Yes	Yes	No	No
chromatic	No	Yes	No	No

caramel brown (noun)	chromatic (noun)
a medium to dark tan color

caramel brown (adjective)	chromatic (adjective)
having the color of caramel; of a moderate yellow-brown	being or having or characterized by hue
	based on a scale consisting of 12 semitones
	able to refract light without spectral color separation