The following four images show the process of coming to a final illustration for one project.
The assignment was to illustrate the idiom "cat got your tongue." Which I did in a particularly gruesome way. The first image is the values sketch. The second is the first color rough I did which was rejected for being too warm. The third image is an exploration of the image using only cool colors, and that was rejected because of the green color of the bed. The fourth and final image is an entirely blue hued version, which was pretty much accepted except some folks thought the blue of the bed was too warm. Anyway, enjoy!