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Part III: Graphics > Designing Graphics with the Web Palette

Chapter 17. Designing Graphics with the Web Palette

When images with colors from the full 24-bit color space are displayed on 8-bit monitors (capable of displaying only 256 colors), browsers do the best they can to render the image using colors in their own built-in Web Palette. (Note that if the browser is running on a 24-bit display, the Web Palette does not come into effect and all colors will be displayed accurately.)

Remapping images to the Web Palette can result in unpredictable and undesirable dithering. Not only that, sometimes flat colors shift to the nearest web-safe colors without dithering. The algorithm for deciding which colors to shift and which to dither (as well as choosing where to shift) differs depending on the browser brand and version.


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