Skewbald is a color pattern of horses. A skewbald horse has a coat made up of white patches on a non-black base coat, such as chestnut, bay, or any color besides a black coat. Skewbald horses which are bay and white (bay is a reddish-brown color with black mane and tail) are sometimes called tricolored. These horses usually have pink skin under white markings and dark skin under non-white areas.