RGB to CMYK
Enter R, G, B values (0–255) and get the CMYK percentages for use in print production. Useful when preparing digital assets for offset printing or creating a colour system that covers both screen and print.
Last updated: May 28, 2026
Find this tool useful? Support the project to keep it free!
Buy me a coffeeWhat is RGB to CMYK?
RGB is the additive colour model used for screens; CMYK is the subtractive model used for ink printing. Converting RGB to CMYK gives you the ink percentages closest to a screen colour, though exact reproduction depends on the printing process and paper stock.
The conversion goes through a standard formula: normalise RGB to 0–1, compute K from the darkest channel, then derive C, M, Y relative to the K channel.
How to Use RGB to CMYK
Enter R, G, B values (0–255 each)
The C, M, Y, K percentages appear instantly
Copy the values for use in your print design application
Common Use Cases
- Designers translating digital mockup colours to print-ready CMYK specs.
- Brand teams bridging screen and print production in a unified colour system.
- Pre-press operators checking the CMYK breakdown of design-app RGB values before sending to press.
Example Input and Output
Converting the Tailwind blue-500 RGB value to CMYK.
R:59, G:130, B:246C:76%, M:47%, Y:0%, K:4%Need HEX first?
If you have a HEX code, use HEX to CMYK directly — no need to convert to RGB first.
Browser-side only
Conversion runs locally in your browser.