Bay is a hair coat color of horses, characterized by a reddish-brown or brown body color with a black point coloration on the mane, tail, ear edges, and lower legs. Bay is one of the most common coat colors in many horse breeds.
A bay mare
The horses of the New South Wales Mounted Police show some of the typical variations in the bay color.
A very dark bay horse might appear to be almost black
Dark bay or "brown" horses often have lighter hair around the muzzle, eyes, flanks, and elbow