I would just like to point out that changes like that would not mean a thing to my viewing pleasure, since I set my browser to use my color set. I like a black background with a dark orange text and blue/red links. It looks similar to the original monitors from back 30 years ago. It does play havoc on some javascript menus, but it is way easier on my eyes, when reading html all day. White backgrounds give me eyestrain.

It also "filters out" the "visual wham-factor" that sites try to hit you with, and just lets thru the true content.