The cross between a Roan Chestnut 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. Base coat with a reddish body, mane and tail, with no black pigment., and a Gray Chestnut 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. Base coat with a reddish body, mane and tail, with no black pigment., produces equal chances (25% each) for: Gray Roan Chestnut (25%), Roan Chestnut (25%), Gray Chestnut (25%) and Chestnut (25%). Results vary according to the genotype of each parent — use the filters above to explore specific combinations.