What color are his parents? He can only be champagne if one of his parents is champagne. Assuming that's his dam in the background, she's a palomino, IMO. If his sire was a champagne, there is a chance he could be a gold champagne. If not, he's a palomino and his mane will lighten up as he grows.
IMO he's a gold champagne.. He has that sheen and "orange-ish" glow to him. The color mane and tail in relation to his body color and something about his pasterns also scream champagne to me.
He doesn't have the amber eyes of a champagne (at least on the bald-face side-can't see the other eye well enough to say), because he also has splash, which is giving him the blue eyes.
His skin also looks to be the pink-ish color that champagnes have- especially visible around his sheath. It would be much easier to be tell if his muzzle wasn't white..
His foal coat is accurate to that of a lighter gold champagne as well.
I agree that his dam isn't champagne. If the foal is in fact champagne, then he got it from him sire.