It is always challenging to match CMYK colors 100% on paper. Mixing colors on the computer can be challenging, namely when you are trying to translate specific colors to work in a four-color printing process. However, when color matching is critical, you should use a CMYK chart and enter the values that best reflect the color you are trying to reach.
Your software program and file type impact the best way to do color matching. Software programs have different tools to do color corrections, and some programs do not have any tools for color corrections. When printing a process (CMYK) document, you should make sure all of your colors are made up of process inks. For example, one hue of green can be made by combining 100% cyan and 100% yellow, and that hue can be changed by reducing the amount of yellow or cyan, or adding small amounts of magenta or black.
When color fidelity is critical, US Printing recommends that you order a hardcopy color proof. A hardcopy color proof, which can be selected for most US Printing products, is the only way to ensure the color accuracy for your print job.
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