RGB vs CMYK: RGB is the additive colour model used for screens; CMYK is the subtractive model used for printing. Design for screen in RGB and convert to CMYK for print.
| RGB | CMYK | |
|---|---|---|
| Used for | Screens, web, digital | Printing, ink on paper |
| Type | Additive (light) | Subtractive (ink) |
| Channels | Red, Green, Blue | Cyan, Magenta, Yellow, Key (black) |
| White | All colours on | No ink (paper) |
| Black | No light | Equal CMY + K |
| Range | Wider (more vivid) | Narrower (print-safe) |