The Collaborative International Dictionary of English v.0.48:

blood-red \blood-red\ adj.
   having any of numerous bright or strong colors reminiscent of
   the color of cherries or tomatoes or rubies or blood.

   Syn: red, carmine, cerise, cherry, cherry-red, crimson, ruby,
        ruby-red, scarlet.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

blood-red
    adj 1: of a color at the end of the color spectrum (next to
           orange); resembling the color of blood or cherries or
           tomatoes or rubies [syn: red, reddish, ruddy,
           blood-red, carmine, cerise, cherry, cherry-red,
           crimson, ruby, ruby-red, scarlet]