How do chameleons change color?

How do chameleons change color?

Chameleons will change color because underneath their skin there are different layers and these layers will respond to the environment. Sometimes they use these for a kind of a defense where they can blend in better with their environment, like camouflage. Some chameleons will actually go through their color change very quickly, and some of them will take a very long time, but it's pigments under the skin, where certain pigments are allowed to be displayed more than others and they can change their color to match the surroundings.