After the introduction by the Spanish, Paint horses joined the numerous herds of wild horses, which roamed the plains of western America. They feature specific coat colors, which usually combine white and black. Color patterns are divided into three categories: tobiano, overo and tovero. Color combinations may also include palomino, bay, brown, sorrel, dun, grulla, grey and roan. Paint horses are square-built, strong-boned and balanced, and they are used both as draft- and sport-horses.