How it works
How to use the RGB to CMYK Converter
Enter a RGB color
Type a RGB value or use the color picker — the CMYK value updates instantly.
Read the results
Every equivalent value is listed, with the most relevant one highlighted.
Copy what you need
Each result has its own copy button.
About the RGB to CMYK Converter
RGB describes a color by its red, green and blue light intensities from 0 to 255 — the native model of every screen. CMYK (cyan, magenta, yellow, key/black) is the subtractive model used for printing. Enter a RGB value to get its CMYK equivalent, plus every other format, the nearest CSS color name, tints, shades and harmonious palettes.
Built for developers
Why developers use it
Private by design
Runs 100% in your browser. Nothing you paste is uploaded, logged or stored on a server.
Instant results
Output updates as you type, with precise error locations when something is wrong.
Works offline
Once loaded, the tool keeps working without a connection. Install it as an app if you like.
Free, no sign-up
No accounts, no limits, no watermarks.
FAQ
Frequently asked questions
Why do some conversions lose a tiny bit of precision?
HEX and RGB use whole numbers from 0–255, while HSL, HSV and CMYK use percentages. Converting between them rounds to the nearest whole value, so a round trip can differ by one unit — invisible to the eye.
Is CMYK here the same as my printer’s CMYK?
This is the standard device-independent formula. Professional print work uses ICC color profiles (such as FOGRA or SWOP) that account for ink and paper, so treat these values as a starting point and proof on the real press.
Is my data uploaded anywhere?
No. Everything runs locally in your browser — nothing you type, paste or open is sent to a server, logged or stored. The tool keeps working offline once the page has loaded.
Keep going
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