WordNet sense 1 (a deep and vivid red color):

crimson, deep red

WordNet sense 2 (of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies):

carmine, cerise, cherry, red, reddish, ruddy, scarlet, blood-red, ruby-red, cherry-red

WordNet sense 3 (being or having or characterized by hue):

chromatic