The above painting is of a Gypsy Cob or “Tinker Horse”. You can read more about this breed of horse here.
I chose this painting to challenge myself, also. I wanted to work on capturing black by using the three primary colors. The other thing I found fascinating was the fact that the remainder of the horse was tones of white. I did not paint this piece fast. I carefully drew the horse as a line drawing. I modeled in the shapes in the the whites and the blacks by using varied saturations of red, yellow and blue. I mixed all my colors on the paper by scumbling them together with water. The background was painted after I wet it thoroughly and scumbled yellow and two reds together, softening and lifting with tissue as I worked.
Stephen Kellogg has written a beautiful poem about this horse, here.