The RGB color space reference article from the English Wikipedia on 24-Apr-2004
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RGB color space

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An RGB color space is any color space based on the RGB color model.

RGB is shorthand for Red, Green, Blue.

Since RGB is such a convenient color model for computer graphics, there are several color spaces based on it in existence. The most used RGB color spaces are sRGB which is the standard target space for generic monitor output (web design, interactive CD's, computer games, etc), and Adobe RGB which is the de facto standard for professional 24 bit capture and processing.