blood-red vs ruby-red

blood-red and ruby-red both are adjectives.

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

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

blood-red and ruby-red: 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 blood-red include carmine, cerise, cherry-red, cherry, crimson, red, reddish, ruby, ruddy, scarlet.

blood-red (adjective)	ruby-red (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