ruddy vs blood-red

ruddy and blood-red both are adjectives.

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

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

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

ruddy (adjective)	blood-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
inclined to a healthy reddish color often associated with outdoor life