Help with mountain horned dragon

[stunrb]

I'm worried about my MHD, from his shoulders to his hind legs is a blue color and has been for a few days now, his head and neck etc. are all regular colours it's almost a perfect band, he eats alot like he always has and is very responsive, everything is normal except the color, am i worrying about nothing, is he ready to shed???????

Any help would be greatly appreciated by both myself and salad fingers,
Thanks