ruby-red vs cerise

ruby-red is not a noun while cerise is a noun.

Word	Noun	Adjective	Verb	Adverb
ruby-red	No	Yes	No	No
cerise	Yes	Yes	No	No

As adjectives, ruby-red and cerise are synonyms defined as:

ruby-red and cerise: of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies

Other synonyms of ruby-red include blood-red, carmine, cherry-red, cherry, crimson, red, reddish, ruby, ruddy, scarlet.

ruby-red (noun)	cerise (noun)
	a red the color of ripe cherries

ruby-red (adjective)	cerise (adjective)
of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies	of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies