RGB-CMYK Converter

Turn RGB values into CMYK percentages and back again while copying the exact values with one click.

RGB to CMYK

Enter red, green and blue channel values (0–255) to calculate the matching CMYK percentages.

Each channel must be a whole number between 0 and 255.

CMYK to RGB

Enter cyan, magenta, yellow and key (black) percentages to see the RGB equivalent.

Use values between 0 and 100. Decimals are allowed for finer control.

What this tool does

This converter changes RGB color values into CMYK percentages and back again. It displays both results together with a simple color preview.

How to use the tool

  1. Enter the RGB channels or the CMYK percentages in the matching fields.
  2. Let the opposite values be calculated and review the preview.
  3. Copy the result you need for your digital or print-oriented document.

Useful applications

  • Converting web colors for an initial print-preparation step.
  • Checking CMYK values in a quick screen-oriented preview.
  • Documenting color values in a technical specification or design system.

Notes and limitations

  • RGB and CMYK describe different color spaces, so round trips can produce visible differences.
  • The calculation is not a color-accurate simulation of a particular print profile.

Frequently asked questions

Why do RGB and CMYK sometimes look different?

RGB describes display light while CMYK describes ink. Some colors cannot be represented identically in both spaces.

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