Short and dense.Color. Black Mouth Curs come in many colors. Short and dense.Color. Black Mouth Curs come in many colors. All shades of red, yellow and fawn; black; brown; buckskin; or brindle; with or without black muzzle or mask. Very small amounts of white are allowed under the chin, around the nose, on the neck, chest, legs, and tip of tail, provided that no more than ten percent total of the dog's body may be white. Dilute coat colors are acceptable and may be identified by the following traits: green, yellow, or light brown eyes; white toenails; red or yellow coat without any trace of black hair. Never spotted, mottled, merle, or with white collar.