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Private browser utility / Color & Design

Free RGB to CMYK Converter

Runs entirely in your browser - no upload, no sign-up.

Live workspaceLocal processing

RGB Input

#ff0000

CMYK Output

Cyan0%
Magenta100%
Yellow100%
Key (Black)0%
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rgb to cmyk / browser utility
01 / Overview

What is an RGB to CMYK converter?

An RGB to CMYK converter transforms digital screen colors (RGB: 0-255 per channel) into print-ready CMYK percentages (0-100 per channel). Pick or enter an RGB color and instantly see its CMYK equivalent, then copy the result as a function or raw values. The conversion runs entirely in your browser.

02

How to use

  1. 01
    Enter or pick an RGB color

    Type RGB values as "255, 0, 0", use the color picker, or paste an existing RGB value.

  2. 02
    View the CMYK result

    The converter shows the equivalent CMYK percentages instantly, plus a live color preview.

  3. 03
    Copy the output

    Copy the CMYK function, comma-separated values, or switch to CMYK-to-RGB mode to reverse the conversion.

03

Who it's for

  • Graphic designers preparing digital mockups for print production by converting screen colors to print specifications.
  • Print professionals checking how a web color will appear when printed, or validating color values from clients.
  • Web developers understanding the difference between screen and print color spaces when building design systems.
  • Students and educators learning about color theory and the technical differences between additive and subtractive color models.

RGB and CMYK are two different color models. RGB (red, green, blue) is additive - it mixes light for screens and digital displays. CMYK (cyan, magenta, yellow, key/black) is subtractive - it describes ink mixtures for print. This tool calculates the mathematical conversion between them.

Your colors stay on your device - nothing is uploaded. The conversion is instant and you can copy the result in multiple formats ready for design software or stylesheets.

FAQ

Is this RGB to CMYK converter free?

Yes. The converter is free to use with no account, download or usage limit. Convert as many colors as you need.

Is my color data uploaded?

No. The RGB to CMYK conversion happens entirely in your browser using JavaScript. Your color values never leave your device.

Why does my printed color look different from the screen?

RGB and CMYK use different color ranges. RGB can display colors that CMYK cannot reproduce in print. This converter shows the mathematical equivalent, but the actual printed result depends on the printer, inks and paper.

Can I convert CMYK back to RGB?

Yes. Use the CMYK to RGB mode to reverse the conversion. Enter CMYK percentages and see the equivalent RGB values.

What is the difference between RGB and CMYK?

RGB is additive (light-based) for screens - it mixes red, green and blue light. CMYK is subtractive (ink-based) for print - it mixes cyan, magenta, yellow and black ink. They have different color ranges, so not all screen colors can be printed exactly.

Do I need an ICC profile for accurate conversion?

This tool shows the standard sRGB-to-CMYK conversion. For production print work, use your printer's ICC profile in design software like Adobe InDesign or Photoshop for the most accurate color match.