First introduced in Bill Finger and Bob Kane's Batman #1 in 1940, the Joker is a terrifying clown with a twisted sense of humor and a talent for murder. His purple suit, white skin, and ghoulish red smile have become a staple in Batman's stories, and readers can't get enough of his rampages in the comics, on TV, and on the big screen.
Source：https://www.cbr.com/most-evil-things-joker-has-done/
