Use CMYK for print artwork whenever your design software allows it. RGB is designed for light on screens, while CMYK describes the ink used for printing.
| RGB | CMYK | |
|---|---|---|
| Made for | Screens (light) | Printing (ink) |
| If you supply it | Must be converted for production. Bright blues, greens, oranges and neons may become less saturated or shift | More predictable colour preparation |
See screen colour vs printed colour and why print colours vary between orders.
It will be converted for production, and bright colours may shift. If colour matters, convert to CMYK yourself, review the result and order a sample.
Check your tool's export options. Where CMYK is not available, expect some colour shift and order a sample.