Chameleons are reptile lizards that live in rainforests and deserts around the world. Chameleons are best known for their ability to blend in with their surroundings. They don’t usually change color because they want to. They change colors based on their mood and temperature. If a chameleon is stressed, it will change color. They do this by using chromatophores on their skin. Chromatophores are special organs that contain pigment, or coloring. This coloring gets released when the chameleon is feeling something and that is how chameleons change color!