Use all of the colors you want, but it's best not to make your pages resemble an LSD nightmare. Watch out for dark colored text on a dark background and light colored text on a light colored background. If not, change your colors. Thirty to 50 kilobytes per page is about the right size. With all the different Web browsers and monitor screens, not everyone views your Web site in the same window size.
Visitors have to scroll to see all of most Web pages.
To keep scrolling to a minimum, the most universal browser window size is 800 pixels wide by 600 pixels high. This visual window is even smaller for AOL Web browsers, which make up the largest single segment of the Web audience. To cater to the AOL audience, design your pages 588 pixels wide by 254 pixels high. Use the top third of this space to display the most important information. Pop-up advertisements are a good way to start.