Mine looks like that after every shed as well, those are just the fresh healthy scales that are exposed after a shed, you will notice that the color seems to fade as time goes on until the next shed anyway...
I think it is because the scales are brand spankin new and so are flawless on the surface, after abrasion on their substrate the luster fades...
Definitely nothing to worry about, it is definitely a sign of health, its like having a luscious full head of hair, except its scales...