Plan A was to keep the water in the background in the cool blue range of colors to balance the warm colors of the rocks. After finishing that area, I felt that the cool colors were a bit too isolated from the rocks.
Plan B–add some warm colors. I did that as some reflections in the water from rocks that are outside of the composition. That gives the viewer a mental picture of more rocks continuing beyond the water.
One more step to complete the painting and that will be to add any details or contrast or to get rid of any more of the whites.