Interactive HTML Tutorial

In the early days of the Internet, when most computer monitors only displayed 256 different colors, a list of 216 Web Safe Colors was made up so that the colors you chose for your web pages always displayed correctly.

Most of the of the old computer monitors are no longer in use, so this really isn't an issue anymore. You will still come across websites that teach that you should only use these colors. That's no longer true, but the chart is still valuable to show you hex codes along with the colors they display.