Carn- is the Latin root for "flesh," and "incarnates" is Latin for flesh-colored. English speakers picked up the "pinkish" sense of "incarnadine" back in the late 1500s. Since then, the adjective has come to refer to the dark red color of freshly cut, fleshy meat as well as to the pinkish color of the outer skin of some humans. The word can be used as a verb, too, meaning "to redden." Shakespeare used it that way in Macbeth: "Will all great Neptune's ocean wash this blood clean from my hand? No, this my hand will rather the multitudinous seas incarnadine, making the green one red."
