purplish-black vs neutral

purplish-black is not a noun while neutral is a noun.

Word	Noun	Adjective	Verb	Adverb
purplish-black	No	Yes	No	No
neutral	Yes	Yes	No	No

purplish-black (noun)	neutral (noun)
	one who does not side with any party in a war or dispute

purplish-black (adjective)	neutral (adjective)
of black tinged with purple	having no hue
	possessing no distinctive quality or characteristics
	lacking distinguishing quality or characteristics
	not supporting or favoring either side in a war, dispute, or contest
	having no personal preference
	having no net electric charge
	having only a limited ability to react chemically; chemically inactive