Many different colors can be used in this picture since it has a lot of different things to paint. One the best color to give the horse is brown. Although all horses are not brown, this is one the most preferred color this horse. While the horse can have brown color, the tail and the upper head part can be color with light brown shades or a light yellow shade. The seat mat can be colored in different ways like, coloring the outline with yellow and the inside with red and coloring the star with one of the pretty bright colors like purple. The eye can be left out just like this or colored very light yellow. The bottom part can also be colored with red or yellow and coloring the background with a light color would be preferred here.