A close-up of Black Hat from 1063: Kill Hitler
|First appearance||12: Poisson|
Black Hat is a stick figure character in xkcd. He is distinguished by his eponymous black hat. In his earliest appearances, Black Hat wore a taller top-hat style hat, that quickly evolved to have the current shape and style of a boater.
As stated in the title text of 29: Hitler, "the hat guy" is based on character named Aram from the now-defunct webcomic Men in Hats. Like Black Hat, Aram seems to have frequently made judgmental, insulting or controversial comments in a very emotionless manner.
Black Hat does not appear to have originally been a reference to Black hat hacking. However, the character has evolved to have very similar motivation, hatching evil schemes often for no reason other than to cause chaos or go against the societal norms. He has found a female counterpart in Danish.