The cross between a Roan Black stallion, whose coat the (Rn) gene acts on the base coat by distributing white hairs throughout the body, giving it a roan appearance. The head and legs retain the original base color tones. Entirely black coat, with no dilutions and no Agouti gene action restricting black pigment to the points., and a Gray Dark Brown 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. Dark brown coat, often nearly black, with black points, expressed over the bay base., can produce 16 different coat colors: Gray Roan Bay (13%), Roan Bay (13%), Gray Bay (13%), Bay (13%), Gray Roan Black (7%), Roan Black (7%), Gray Black (7%), Black (7%), Gray Roan Chestnut (3%), Roan Chestnut (3%), Gray Chestnut (3%), Chestnut (3%), Gray Roan Dark Brown (1%), Roan Dark Brown (1%), Gray Dark Brown (1%) and Dark Brown (1%). Results vary according to the genotype of each parent — use the filters above to explore specific combinations.