Chameleons change colors to communicate or regulate their temperature, not
to disguise themselves.

It is a common misconception that chameleons change colors for disguise, to
camouflage themselves and blend in with the environment. Chameleons, in
reality, change color to either regulate their temperature or communicate.
They can absorb more heat from the sun or reflect it by making their skin
color darker or lighter. They also change colors to communicate information
to other chameleons and even people