All web sites have a background.
This site has a plain white background. Any plain color can be used or a textured background can be chosen. Drop shadows used in the image above do not work with textured backgrounds. Many sites use a plain dark colored background, such as black, with a light or white text. Depending on the user's system, browser and printer, if the site is printed, the colored background may not print, making the text very light or nonexistent on paper.