Monitors use the RGB (red, green, blue) color model, which usually supports a wider spectrum of colors. Printers use the CMYK (cyan, magenta, yellow, black) color model, which can reproduce most—but not all—of the colors in the RGB color model. Even a calibrated monitor cannot show you the exact color that will be printed, but the closest color to it when it gets printed. Depending on the equipment used, CMYK generally matches 85–90% of the colors in the RGB model. When a color is selected from the RGB model that is out of the range of the CMYK model, the application chooses what it thinks is the closest color that will match. Programs like Adobe Photoshop will allow you to choose which color will be replaced. Others may not. The best way to get the correct colors is to have the correct CMYK/RGB values for your colors so that we can match it to the closest ink colors when printed.