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A horse with black skin but white or mixed dark and white hairs. Gray horses can be born any color, and lighten as they age. A dapple gray coat has lighter rings of grey hairs, called dapples, scattered throughout.
A horse with a black base color and the dun gene. Coat is solid "mouse-colored" gray or silver (can also be almost brownish-gray) with black or dark gray primitive markings.
Similar to a cremello, a perlino is genetically a bay base coat with two dilute genes. Eyes are blue. Mane, tail and points are not black, but are usually darker than the body coat, generally a reddish or rust color, not to be confused with a red dun.