White-on-black color scheme : WOB color-scheme

Studies have proven that a color scheme[?] with white (light) text on a black (dark) background is easier to read on the screen, because the lower brightness, causes less eyestrain. The caveat is that most pages on the web are designed for white backgrounds; GIF and PNG images with alpha channels tend to show up with choppy outlines, and various other graphical elements have other problems.