Why do some animals have bright colors in their skin?

Bright colors in animals can serve as a warning mechanism (aposematism), camouflage, or a way to attract mates. For example, the brightly colored skin of poison dart frogs signals to potential predators that they are toxic and should be avoided. In some cases, like the vibrant feathers of peacocks, bright colors are used to attract mates, signaling the health and genetic quality of the individual. Bright colors can also help animals blend in with their environment or serve other survival purposes.