What is Pantone Matching System (PMS)?

Pantone matching system is a proprietary color formulation system capable of producing thousands of possible colors from a basic set of colorants.  Formulas for the colors are published by the Pantone Corporation (a division of X-Rite) and have become a widely used method of specifying colors for publication, package printing and product design. The formulas and the basic colorants are the intellectual property of Pantone Corporation, a wholly-owned subsidiary of X-Rite Corp.