purplish red vs purplish-red

purplish red and purplish-red both are nouns.

Word	Noun	Adjective	Verb	Adverb
purplish red	Yes	No	No	No
purplish-red	Yes	Yes	No	No

As nouns, purplish red and purplish-red are synonyms defined as:

purplish red (noun)	purplish-red (noun)
a red with a tinge of purple	a red with a tinge of purple

purplish red (adjective)	purplish-red (adjective)
	of red tinged with purple