chromatic vs brown

chromatic is not a noun while brown is a noun.

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

chromatic (noun)	brown (noun)
	an orange of low brightness and saturation

chromatic (adjective)	brown (adjective)
being or having or characterized by hue	(of skin) deeply suntanned
based on a scale consisting of 12 semitones	of a color similar to that of wood or earth
able to refract light without spectral color separation

chromatic (verb)	brown (verb)
	fry in a pan until it changes color
	make brown in color