My baby panther chameleon started showing his colors when he was around 3 months old. He's a red barred ambilobe. As you probably know, the females will develop very little coloring, and will carry neutral colors like green, brown and grey, and the males are the ones who have the brilliant coloring. It really amazed me at how fast the males complete their coloring too. Here's my guy chester at a little under a year old.