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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

Client-Side Processing
Input Data Stays on Device
Instant Local Execution
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What 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

1

Enter R, G, B values (0–255 each)

2

The C, M, Y, K percentages appear instantly

3

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.

RGB input
R:59, G:130, B:246
CMYK output
C: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.

Frequently Asked Questions

Does RGB to CMYK conversion produce exact print colours?

The conversion is mathematically consistent but printed results depend on ICC profiles, paper stock, and printer calibration. Use the values as a starting point and verify on press.

Is my data sent to a server?

No. All conversion runs in your browser.

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