Slate published this wonderful Cartoon Color Wheel. Created by Natalie Matthews-Ramo, Brahna Siegelberg, Jeremy Singer-Vine, Isabel Slepoy, and Forrest Wickman, it breaks out the universe of popular cartoon characters by color. Take a moment and visit the Slate article, "Red Skull is Red, Smurfette is Blue," where the poster is interactive. Just run your cursor over the character and you can learn more.The color wheel seperates them by fur or skin or shell or sponge color. Bart, Tweety and Top Cat are all yellow while Frylock and Bob the Tomato are both red. Does it mean anything? N-a-a-a-h-h-h-h-, I don't think so. It's just fun and colorful. Enjoy it!