For patterns pitting color against color, birds seem to win the prize. The paradise tanager, the red-crested turaco, the green twinspot, and of course the macaw: All wear colors with abandon, reds and greens and blues side by side in vibrant designs.
Angelfish glow as if neon under water. Chameleons can change their hues. Poison frogs dare to clothe themselves in the most unnatural of blues and yellows—effective in discouraging predators, experts presume.