"Colors Royale" is an episode of Special Agent Oso.
Dotty and Wolfie train Oso to go through a swamp without leaving a trail of footprints or being followed. Oso puts on his swamp boots and tries finding a way to make it through the mud, but he makes a fatal error by leaving muddy paw prints on trees. That's when Paw Pilot calls in a special alert. Oso shows a boy, Nicholas, how to mix yellow and blue paint to make green so he can paint the grass in his painting to show his grandpa. Can he get his painting done before his grandpa comes to see it?