top of the head question

[Electric]

Just wondering if the top of the head usually takes time to fill in with colour? I have a juvenile panther and the top of his head always seems to be pretty much the same colour no matter what colours he's displaying on his body. It's usually a white/pink colour sometimes light purple, but for example I havn't seen it turn bright blue when he shows me blues on the body..

Is this normal or does my guy have an albino top of the head?

 

[Chameleon Kingdom]

A picture would help give us an idea.

 

[Electric]

I'll try to snap one tomorrow if I get the chance though I have a feeling it will be hard to see what I mean by a pic