Following are the colors that a horse can have on AVH.
Amber Champagne
Amber Cream
Bay
Bay Roan
Black
Blue Roan
Buckskin
Chestnut
Classic Champagne
Classic Cream
Classic Dun
Cream Grulla
Cremello
Diluted Seal Brown
Dunalino
Dunskin
Flaxen
Gold Champagne
Gold Cream
Gray
Grulla
Palomino
Perlino
Perlino Dun
Red Dun
Sable Champagne
Sable Cream
Seal Brown
Seal Brown Cream
Silver Dapple
Silver Dapple Bay
Silver Dapple Brown
Silver Dapple Buckskin
Silver Dapple Dun
Silver Dapple Dunskin
Silver Grulla
Smoky Black
Smoky Cream
Smoky Grulla
Strawberry Roan
White
Wild Bay
Links: rare colors, markings, patterns, genetics, Challenger horse colors