Here is a small watercolor seascape done in Anders Zorn limited palette of ivory black, white, yellow ochre, and vermillion.

The challenge of course was no blue for sky and water. No matter though. I used the white with black to get a cool gray for the distant clouds, black with yellow ochre to get a green gray for the water and generally saved mixes of vermillion and yellow ochre for the rocks. There were a few mixes of three colors but that was for subtly in keys areas, primarily to help turn form.

*If you saw this previously the color was too warm. This is a more color accurate pic. 12/12/13