User blog comment:BlankyXP/Every mushroom cloud has a silver lining./@comment-3067644-20111224175246/@comment-2023960-20111224175923

What I would have done, is make their skin tones gray and colorless, then edit the shade of gray according to their skin tone. Like, if they were a black character, they'd be a darker gray, and if they were ghastly pale, they'd be very light gray. Then, make the eyes blank, or at least pure white. And make the hair colors duller than their usual ones. The end.