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Color converter

CMYK to RGB converter

Convert CMYK to RGB / HEX with real ICC profile conversion (U.S. Web Coated SWOP v2 and Coated FOGRA39) computed in your browser via Little CMS. Free, no signup, fully client-side.

Quick picks

CMYK press profile

Dominant US offset standard for coated paper. Default for North-American print shops.Source RGB is sRGB v4. Conversion runs in your browser via Little CMS with the real ICC profile. Results follow the selected profile and rendering intent. Upload your print shop's own .icc to soft-proof against it (the file never leaves your browser).

On screen (sRGB)

What you see on this monitor

#FF173D

Press preview · U.S. Web Coated (SWOP) v2

Approx. how the CMYK ink looks once printed

#FF173D

RGB · 0–255

CMYK · 0–100%

Cyan0%
Magenta91%
Yellow76%
Key (black)0%
Use #FF173D in Polotno Studio →

Quick answers

  • C0 M91 Y76 K0 → RGB(255, 23, 61) → #FF173D · ≈ Pantone 185 C under sRGB
  • C40 M30 Y30 K100 (rich black) → RGB(0, 0, 0) → #000000 · K100 alone also resolves to pure black on screen
  • C100 M0 Y0 K0 (cyan) → RGB(0, 255, 255) → #00FFFF · C0 M100 Y0 K0 → #FF00FF · C0 M0 Y100 K0 → #FFFF00
  • C20 M15 Y15 K0 → RGB(204, 217, 217) → #CCD9D9 · Cool light gray, common neutral build
  • C0 M0 Y0 K0 → RGB(255, 255, 255) → #FFFFFF · Pure white = no ink

You have a CMYK build from a print spec sheet and you need its RGB equivalent for a digital mockup or web preview. The picker above runs the real ICC profile conversion in your browser. Pick the press the file targets and the RGB output reflects how the printed result will look on stock. Or upload your shop's own ICC profile for a closer soft-proof preview.

Real ICC profiles, not an approximation

This page bundles the actual ICC profile files and runs them through Little CMS compiled to WebAssembly, the same color-management engine that powers Firefox, GIMP, and most Linux print pipelines. Results come from the selected source profile + perceptual rendering intent, not a simple formula. Many lightweight converters skip the ICC engine and silently assume US SWOP → sRGB.

Bundled profiles: sRGB v4 (ICC, freely distributable), U.S. Web Coated (SWOP) v2 and Coated FOGRA39 / ISO 12647-2:2004 (Adobe Color Profile Bundling Agreement).

Bring your own ICC profile

Most pro print shops have their own ICC profile that captures their press, paper, and ink behavior. Click ↑ Upload your shop's ICCin the profile picker to use it as the source profile. The file is parsed entirely in your browser. Polotno never sees it, and it is not uploaded. That lets you test your shop's profile without installing a desktop color-management app.

Common CMYK builds: RGB result (sRGB destination)

CMYKRGBHEX
C0 M91 Y76 K0 (Pantone 185 C red)255, 23, 61#FF173D
C100 M0 Y0 K0 (process cyan)0, 174, 239#00AEEF
C0 M100 Y0 K0 (process magenta)236, 0, 140#EC008C
C0 M0 Y100 K0 (process yellow)255, 242, 0#FFF200
C0 M0 Y0 K100 (pure black)0, 0, 0#000000
C40 M30 Y30 K100 (rich black)0, 0, 0#000000
C20 M15 Y15 K0 (cool neutral)204, 217, 217#CCD9D9

Frequently asked questions

Q: How do I convert CMYK to RGB?

The simple formula is: R = 255 × (1 − C/100) × (1 − K/100); G and B follow the same pattern with M and Y. That is useful for rough estimates. For better production results, this page uses ICC profile conversion so the RGB / HEX output reflects the selected CMYK source profile and sRGB destination profile. For brand colors, the result is the closest screen equivalent of your printed color under that profile.

Q: Why does CMYK look duller than RGB?

Because CMYK has a smaller gamut than RGB. RGB is additive light and can render saturated electric blues, neon greens, and pure magentas that a four-color press cannot reproduce with ink. When you convert CMYK back to RGB on screen, the ink mix can only describe colors inside the press gamut, so they look duller compared to a native RGB design hitting the same hue. Soft-proof in your design tool with the right ICC profile to see the gamut shift before you finalize.

Q: Can I get a HEX value from CMYK?

Yes, once you have RGB, formatting it as HEX is mechanical: convert each 0–255 channel to a two-digit hex pair and concatenate with a leading hash. The converter on this page outputs the HEX value live as you adjust CMYK channels. Useful when you have a print color spec from your brand book (e.g. C100 M70 Y0 K20) and need the closest on-screen equivalent for web mockups, social posts, or email headers.

Q: Which RGB color space should I target?

Default to sRGB for anything that lives on the web. It is the color space every browser, monitor, and social platform uses by default. This page targets sRGB v4 as the destination, paired with the CMYK source profile you pick (U.S. Web Coated SWOP v2 or Coated FOGRA39). For wider-gamut workflows on calibrated monitors, use the RGB destination profile your production workflow requires.

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