Here's a cover Crumb did for his Mystic Funnies #1 comic book in 1997. Crumb created a color rough for this cover, and Alex Wood color separated and printed the comic book using his color guides as reference. So Crumb didn't color separate this particular comic book cover.
.--.-.-.Cass Elliot and Michelle Phillips, captured in a playful moment during a 1967 promotional photo shoot...-.- ๐ธ Michael Ochs Archives / Getty Images--.-.