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Adobe Photoshop CS3 A-Z by Philip Andrews

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An international standard for color measurements developed by the Commission Internationale de L’Eclairage (CIE).

It’s capable of reproducing all the colors of RGB and CMYK and uses three channels - one for luminosity and the other two for RGB type color ranges.

Some users prefer to work in this mode as it’s device independent and colors that fall into the CMYK gamut aren’t changed when you convert to CMYK.

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