Hi everyone! I think that The Simpsons is no longer the only series where the most of the characters are yellow, there is a Disney's animated series which also has that feature and is called "Big City Greens":

The difference is that the main characters of that show are the only ones that are yellow, because the background characters who appear to have colored (e.g. purple, red, green, yellow, blue) skins rather than normal human skin color.

And what's your opinion about this Disney's cartoon that looks like The Simpsons because are yellow? Draw your conclusions commenting on this post. Greetings! =D