"Hartman's cartoons are instantly recognizable: visually, his character designs tend to be angular and have thick outlines. Most notable is that his are the few characters in TV animation to have colored eyes rather than black circles. Writing wise, expect the characters to be so self-aware that you might be asking them if they are holding up the fourth wall, as well as including a healthy dose of pop culture references, both modern and not so modern."
January 1, 1970
https://en.wikiquote.org/wiki/Butch_Hartman