Chameleon Color

Hi all, my 3 month old male panther chameleon's colors are pretty dull, even when it is relaxed or sleeping. I know for sure it is not stressed so it is a darker color, I was just wondering if it was normal if a 3 month old male panther chameleon has little to know color besides black, brown, grey, white, and hints of green. When will I start seeing more color?
 
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