sapphire vs chromatic

sapphire is a noun but chromatic is not a noun.

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

sapphire (noun)	chromatic (noun)
a light shade of blue
a transparent piece of sapphire that has been cut and polished and is valued as a precious gem
a precious transparent stone of rich blue corundum valued as a gemstone

sapphire (adjective)	chromatic (adjective)
of something having the color of a blue sapphire	being or having or characterized by hue
	based on a scale consisting of 12 semitones
	able to refract light without spectral color separation