The Pantone Matching System (PMS) is a popular system for printing inks. Often a printer has two choices for creating an ink color: process color and spot color. Process color uses a mixture of four specific colors - cyan, magenta, yellow, and blacK (CMYK) - to create the desired shade. Spot color uses a matching system to create the shade. By specifying the official Pantone name or number, you can be assured of the color match when the file is printed.