The term 'Printers' Primary Colors' refers to the three colors used in the process of printing: cyan, magenta, and yellow. Cyan is a blue-green color that is created by combining equal parts of blue and green light. Magenta is a bright pinkish-purple color that is created by combining equal parts of red and blue light. Yellow is a bright yellow color that is created by combining equal parts of red and green light. Together, these three colors form the basis for all other colors used in printing.