These are the 216 browser safe colors that look equally good on both PC and Mac operating systems, Microsoft and Netscape browsers. Use another color and the browser will try to create the color by combining (dithering) a number of the 216 acceptable colors.

The resulting color could be slightly different to the color you had intended. Stick to these 216 colors (Hex code) and you will be sure that the resulting color is what you intended.