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Indexed mode

The indexed color version of an image is limited to a maximum of 256 colors, and is used when you’re preparing images for viewing on computer monitors. Limiting the number of colors reduces the file size, allowing quick loading and display of images on Web pages. When you convert an image from RBG to indexed mode, Photoshop Elements creates a color table for the image, designed to represent the color palette of the image as accurately as possible. When the image contains colors not included in the color table, Photoshop Elements chooses the closest available color (Figure 3.3).

Figure 3.3. Indexed images are made up of 256 colors, as represented in the color table above.



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