The Sun is white. And I found a neat demonstration about that on the SOHO website "To demonstrate this, take a sheet of white paper, go into a dark room, and shine a red flashlight on it. What color do you see the paper? The white sheet of paper appears red. This works for any color of illumination. A green laser pointer shined onto the paper will make the white paper appear green, and so on. The white paper will appear the same color as its source of illumination. Now take the same sheet of white paper out into the full noonday sunlight. What color does the white sheet look like? White!"