The green-skinned crone is actually a relatively new incarnation of the evil witch – in fact, while the evil witch as a cultural narrative dates back millennia, the green skin dates precisely back to 1939 and the MGM film, The Wizard of Oz. Margaret Hamilton’s cackling and emerald-tinted portrayal of the Wicked Witch of the West, rendered in vivid Technicolor, is the only reason that anyone associates green skin with witches.