Bay horses come in many different colors. Light copper red, rich red blood bay, and even a very dark red or brown called dark bay, mahogany bay, black-bay, or brown. The darkest of the bay shades is dark or mahogany bay. This shade has a deep, rich brown to black color with a hue of dark red. It’s the darkest and most common bay shade. Blood bay horses are the best-known variety of bay horse. They have dark red coats with black points. The color of the coat is very dark and can look like a hue of purple. They stand out in a crowd and are truly something to be seen! Copper bay horses have rich reddish-orange-brown body coat with black point coloration. This color tends to be more bright in comparison with mahogany or blood bay. It looks more like a copper penny.