Unless there's a history of appaloosa coat patterns in her line, I would guess silver dapple. This color is fairly common in miniatures, Icelandics, and some rather obscure draft-pony breeds and is characterized by a silver/dapple body and a light mane and tail. If there is a presence of appaloosa blood, my guess would be a marbled/varnish [Appaloosa terms can get so confusing :( ...]. She seems to have Appy eyes. Beautiful color - she'll be pretty once she sheds out.
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