CMYK to OKLCH Color Converter

Convert CMYK colour values to OKLCH instantly. Free, client-side colour conversion - no signup, no upload, supports the colour picker.

Converter Color Converters Updated Apr 20, 2026
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How to Use
  1. Type or paste a CMYK colour into the input.
  2. The OKLCH value updates instantly. Copy with the button.
  3. Click the swatch to open your browser's native colour picker.
  4. Click any quick-swatch chip to load a real-world starting colour.
CMYK input
OKLCH output
Try:
Reverse: OKLCH → CMYK Other from CMYK: HEX RGB HSL HSV LAB

About CMYK and OKLCH

CMYK — Cyan / Magenta / Yellow / Key for printing.

OKLCH — Polar form of OKLab.

Frequently Asked Questions

Does my colour value leave my browser?

No. The conversion runs entirely in JavaScript on this page.

Why does my picked colour change slightly?

Some colour spaces (LAB / OKLab / wide-gamut) can express colours that fall outside sRGB. Those values are clamped back into the displayable range.

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