However, don't hesitate to use color to layer and separate your information. Remember that GIFs are in 256 colors. That means the gorgeous map you made using millions of colors will be converted to 256 on the World Wide Web. JPEGs have a better compression ratio and look cleaner on the screen. However, not all web browsers support inline JPEGs.
Tufte recommends the colors found in nature as ideal for the envisioning of information.
But don't assume this is always the case. However, try several different color schemes before settling on one in particular. Your own eyes will be the best judge in this case. The World Wide Web currently support film and sound media in various standardized formats. First, such files must be relevant to your composition.