John K. has a nice little post about some background art from a Donald Duck cartoon. He's blogged frequently about how cartoons should have better color design (he specifically love's Art Lozzi's background designs for Yogi Bear). Worth checking out when you get second. He talks about how the color scheme is limited, but not monochromatic. Browns, reds, grays, and oranges are working great together. And subtle enough so when the characters are overlayed, they still pop.