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What is RGB Color?
GB stands for the colors Red, Green and Blue. While CMYK are the colors used for full-color printing, RGB are the colors that monitors and televisions use to show colors.

The mechanisms in monitors and televisions project beams of light to fill every pixel on your screen. RGB is an additive system which means that when you add the three colors together, you get white. When none of the colors are present, you get black (or the absence of light). Images that you find on the Internet are in RGB mode or a variation of it called indexed color.

Frequently you'll find that scans are created in RGB mode and that photos are transported in this mode as well. The reason for this is that RGB photo files divide the data between three "channels" (one for each color) while CMYK photo files divide the color between four "channels." Therefore, CMYK images are bigger files and take up more space on transport media or a hard drive. For best color accuracy though, images should be scanned in the color mode of it's final use (CMYK for color printing and RGB for on-screen viewing).

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