>But is "incarnadine", meaning the red color of blood, also rooted in carne- flesh? It would seem odd, since flesh and blood are not the same color.

ah, but if one were to look it up, one would discover that incarnadine, properly, means the color of flesh; i.e., carnation or pink. but since Shakespeare misused it in MacBeth, it is often used for bloodred!

"This my Hand will rather The multitudinous Seas incarnadine, Making the Greene, one Red."

(and he verbed the adj/noun!)