Did you ever notice that your favorite cartoon characters are yellow?
I mean, we've got SpongeBob, Tweety, Winnie the Pooh, Minions, Pikachu, The Simpsons, Pluto, etc.
In other words:
And these legends are yellow for a a few reasons. @ChannelFrederator explains in this video:
The first reason is this thing called color theory — which uses a color wheel to show which colors complement each other.
Yellow and purple complement each other.
Well on TV, they use a ~cool~ color wheel, called the RGB model. In this model, YELLOW actually complements BLUE.
And blue is one of the most common backgrounds in animation:
The second reason is color psychology, which examines what colors are associated with. For instance, colors like red are associated with negative stuff, like rage.