The cross between a Bay stallion, whose coat brown body with black mane, tail, lower legs and ear tips, due to the presence of black pigment restricted to the points by the Agouti gene., and a Gray Black mare with coat the (G) gene acts on the base coat promoting progressive lightening throughout the horse's life until reaching very pale or completely white tones. Entirely black coat, with no dilutions and no Agouti gene action restricting black pigment to the points., can produce 8 different coat colors: Gray Bay (27%), Bay (27%), Gray Black (13%), Black (13%), Gray Chestnut (7%), Chestnut (7%), Gray Dark Brown (3%) and Dark Brown (3%). Results vary according to the genotype of each parent — use the filters above to explore specific combinations.