PMS stands for Pantone Matching System, which is a system of color charting and identification that is used mainly by printers and designers to reference an exact color. Printing, web design, and specialty items all use PMS colors.
Your logo colors should be identified as PMS colors and recorded to help ensure the accuracy and consistency of those colors in the various marketing and advertising applications of your logo.
Wishing you aesthetic beauty in all you do!
Candace Crowe