chromatic vs cyan

chromatic is not a noun while cyan is a noun.

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

chromatic (noun)	cyan (noun)
	a primary subtractive color for light; has a blue-green color

chromatic (adjective)	cyan (adjective)
being or having or characterized by hue	of the blue-green color that is a primary subtractive color of light
based on a scale consisting of 12 semitones
able to refract light without spectral color separation