10 Facts About Web colors

Web colors are colors used in displaying web pages on the World Wide Web, and the methods for describing and specifying those colors.

Web colors have an unambiguous colorimetric definition, sRGB, which relates the chromaticities of a particular phosphor set, a given transfer curve, adaptive whitepoint, and viewing conditions.

In HTML and XHTML, Web colors can be used for text, background color, frame borders, tables, and individual table cells.

Many of these Web colors are from the list of X11 color names distributed with the X Window System.

List of Web colors shipped with the X11 product varies between implementations and clashes with certain of the HTML names such as green.

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Besides new ways to write Web colors, it introduces the concept of mixing Web colors in a non-sRGB color space, a first step towards fixing a well-known issue in color gradients.

List of Web colors is presented as if it had special properties that render them immune to dithering, but on 256-color displays applications can actually set a palette of any selection of Web colors that they choose, dithering the rest.

Different results were obtained by providing an image with a larger range of Web colors and allowing the browser to quantize the color space if needed, rather than suffer the quality loss of a double quantization.

Either no Web colors should be specified, or both the background and all foreground Web colors should be specified to avoid black on black or white on white effects.

Notice that the colors named in the report use different color values than the web colors of the same name.