Free Online CMYK to RGB

CMYK-to-RGB conversion maps subtractive cyan, magenta, yellow and key (black) percentages used in print to the additive RGB triples used by screens.

Your data is processed entirely in your browser and never sent to any server.

Instant results 100% private No signup needed
59
Red
130
Green
245
Blue
Hex#3B82F5
RGBrgb(59, 130, 245)
Formula

R = 255 × (1 - C/100) × (1 - K/100). G uses M, B uses Y. CMYK is subtractive (ink), so colors outside RGB's gamut won't reproduce exactly.

How to Use This Tool

  1. Set Cyan, Magenta, Yellow and Key (black) using the 0–100% sliders or number inputs.
  2. Watch the preview swatch, per-channel RGB values, and resulting hex update live.
  3. Copy the hex or rgb() string using the icons next to each value.

What Is a CMYK to RGB?

CMYK is the four-channel subtractive model used by offset and digital presses — ink absorbs wavelengths from a white substrate, so 100% cyan means "absorb red light." sRGB is the additive model used by screens, where pixels emit light from a black starting point. The standard mathematical mapping is `R = 255 × (1 − C/100) × (1 − K/100)`, with the same shape for G with M and B with Y.

This converter is for designers handed a print spec sheet who need a digital approximation, for marketers reproducing a packaging color on a landing page, and for educators explaining additive versus subtractive color.

Do not use this conversion for brand-critical print matching. CMYK printers have a smaller gamut than sRGB, especially in saturated greens and blues, and accurate conversion needs an ICC profile for the specific paper-and-ink combination you'll actually print on.

Frequently Asked Questions

What is the conversion formula?
R = 255 × (1 - C/100) × (1 - K/100), G = 255 × (1 - M/100) × (1 - K/100), B = 255 × (1 - Y/100) × (1 - K/100). Output rounded to whole numbers.
Why don't CMYK and RGB match exactly?
CMYK is subtractive (ink on paper, smaller gamut) and RGB is additive (light on a screen, larger gamut). Some vibrant RGB colors can't be reproduced in CMYK at all.
Is this an exact print-color match?
No — it's the standard mathematical conversion. For brand-critical print work, use a calibrated color profile (e.g. SWOP, FOGRA) in your design software.

Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.

Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.

Related Color & Design

Hex to RGB

Convert hex color codes to RGB values. Supports 3-, 6- and 8-digit hex (with alpha) for CSS and design workflows.

RGB to Hex

Convert RGB values to hex color codes. Accepts comma- or space-separated input. Outputs 6-digit or 8-digit hex.

HSL to RGB

Convert HSL (hue, saturation, lightness) to RGB. Adjust sliders to see the change live, then copy hex or RGB.

Pantone to Hex

Convert popular Pantone PMS colors to approximate hex values. Bridges print spec sheets to digital design.

RAL to RGB

Convert RAL Classic color codes to RGB and hex. Standard European color reference used in industry and architecture.