Ball python color?

I have a normal ball python that I have a question about. Okay so when I first got him. He was really dark and even after his sheds (3 sheds) he was still dark. But just recently he shed and now he is real yellow almost like a pastel just wondered if this meant he is unhealthy now or what.

Some pictures would help, I don't think that there is anything wrong, BP's can lighten up over time. But pictures would confirm this.

They do shift as they age. Often the yellow darkens or browns out, not always. I have a normal girl whom is going less yellow she is starting to look almost axanthic now... i'd just keep track and double check husbandry. Colour change is not a indication of health as far as I know.