Colors are the important thing for humanoids to have in-order to be recognized in the color it is. Black and white is hard to figure out what color it can be. Some of the films are in color, sepia or black and white. Most 3d animated humanoids are in color especially on the video game characters. These are the examples of the colors from SSBB, one of the examples here are not humanoids:
All others are in greyscale which is very hard to guess what color it is.