Process of color calibrating an electronic display screen comprising the steps of displaying at least one trial color of at least one physical sample having standardized color on an electronic display screen, visually comparing the color of the at least one physical sample and the at least one trial color displayed on the electronic display screen, selecting the trial color having the best visual match with the at least one physical sample, and using the selected trial color on the electronic display screen having the best visual match with the at least one physical sample color to color calibrate the electronic display screen.