White Balance

This is one result of trying all the different white balance settings on this camera (Canon G11), and this one is called Custom White Balance 1. The pattern is made on the ceiling by the small holes in the top of a small desk lamp that is next to my computer. That light is incandescent, and the other in the back is fluorescent.
Our ceiling is quite steep, so there are essentially no side walls except for this part where there is a window and door to go out on the deck. This creates many possibilities for angles, shadows, and different shades of color, depending on where the light is. The real color is eggshell.
I have rotated this one notch to the right.