Convert RGB screen colors to CMYK printing colors.
RGB (Red, Green, Blue) is the color model used for digital screens, emitting light to create colors. CMYK (Cyan, Magenta, Yellow, Key/Black) is a subtractive color model used in color printing.
If you're designing something on a computer that will eventually be printed, you must convert your RGB colors to CMYK to ensure the printed colors match what you see on screen as closely as possible.