How Do Chameleons Change Color?

Words to Know

Crystals

Tiny shiny pieces inside a chameleon's skin that reflect light

The crystals rearrange to make different colors.

Reflect

When light bounces off something

A chameleon's skin reflects different colors of light.

Prehensile

A tail that can grab things like an extra hand

A chameleon uses its prehensile tail to hold onto branches.

Camouflage

When an animal blends in with its surroundings

Chameleons don't just use color for camouflage — they also show their mood!

Check What You Learned

Fun Facts

• Chameleons change color using structural coloration. Their skin contains a layer of cells with nanocrystals (guanine nanocrystals in iridophores) that can rearrange to reflect different wavelengths of light.

  Source: Nature Communications, 2015

• When a chameleon is calm, the nanocrystals are close together and reflect blue/green light. When excited or stressed, the crystals spread apart, reflecting longer wavelengths like yellow, orange, and red.

  Source: University of Geneva study

• Chameleons change color for communication (mood, territory, mating) and temperature regulation, not primarily for camouflage.

  Source: Scientific American

• A chameleon can change color in as little as 20–30 seconds.

  Source: National Geographic

• Chameleons have a prehensile tail that can grasp branches like an extra limb, aiding their arboreal lifestyle.

  Source: San Diego Zoo

• The panther chameleon (Furcifer pardalis) can display some of the widest color ranges, including reds, blues, greens, and yellows.

  Source: Smithsonian Magazine