I'm still using just black and white paint. I haven't yet "graduated" to color. Here I'm working with more complex objects - a glass jar sitting on a yellow brick with a small dark blue vase - and painting the values I see. I painted on a wooden panel (12"x12") that already had a color painting on it so it was a bit confusing at first to find my own drawing but it began to emerge soon enough. It's just a study but I do like the way the color comes through from under the paint.