Color Editor - Snap to Web Browser Palette
When you create images for the web, many people will look at them using a 256 color screen mode. In this mode web browsers use dithering to try and simulate more colors on the screen. This can mean you get a dotted pattern effect as the browser tries to create the exact color you have chosen. However, the browser palette contains 216 colors you can use which are guaranteed not to be dithered by Netscape Navigator and Microsoft Internet Explorer and so appear perfectly smooth on the screen. To use one of these colors, choose the color you want in the Color Editor as normal and then click this button. The color snaps to the nearest of the 216 smooth colors. All 216 colors are also in the Color Gallery so you can drag and drop them straight onto your objects.
If you use transparency or import clipart that uses graduated fills or other more complex objects that generate new colors when they are shown on the screen, colors may be dithered.