What is CMYK?
CMYK stands for Cyan, Magenta, Yellow and Key (Black). Printing with these four colors is often referred to as full color or 4-color printing. Any file that is printed on a printing press must be converted to CMYK. Many images or files designed for web use are in RGB (red, green and blue) color space. These images may shift color when converted to CMYK before printing. If your project is color sensitive, it is recommended that you request a hard copy proof to ensure the end result is to your specifications.