But people hate reading it. Don't write your message in white letters on a dark background. It may look striking. But people hate reading it. A column of light letters on dark background is a nuisance.
People like to read black letters on white.
You can call attention to a few words by putting light letters on a dark background. But a whole column of text like that will drive away your readers. The people you want to reach may not have the latest browser software. Some haven't got colour monitors. Background patterns can make the text difficult to read on some monitors, and nearly impossible when it's printed out.