Often times a print shop will reject your uploaded document if it has an RGB color profile embedded. Printing a document with an RGB color profile often results in the colors appearing faded and muddy: Source: The following chart illustrates the difference in color choice between the two color models: Source: If you’re using an RGB color profile, then it’s possible that you will be using colors that are outside of the range (or “out of gamut”) of what can be produced with ink. Whenever you’re designing something for print, it’s important to ensure that you are using a CMYK color profile. In order to work within the CMYK color space in Photoshop, you’ll have to manually choose your color mode in the Color Mode submenu within the New Document menu: To avoid having to switch RGB to CMYK in Photoshop, it is recommended that you choose a CMYK color profile from the start when opening a new document. This makes for a smaller gamut to sample from than its RGB counterpart.ĬMYK color profiles are primarily used when designing anything that will be printed using ink. Unlike RGB, which uses light to generate its colors, CMYK colors are produced by combining ink. The CMYK color space combinations cyan, magenta, yellow, and black to render every color in its gamut. CMYK - which stands for “cyan, magenta, yellow, and K (black)” - is an additive color model that uses some combination of those four colors to generate every color within its spectrum.
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