RGB to CMYK
RGB to CMYK percentages, with no profile applied.
FREE - NO SIGN-UP - RUNS ON YOUR DEVICE
Runs in your browser tab
- CMYKpercentages
- sRGBsource values
- NoICC profile
- 0uploads
What you can count on
- 4ink channels
- Cyan, magenta, yellow and black
- Read from the sRGB values
- Noprofile applied
- No paper or press is assumed
- Ask your printer for their profile
- 0uploads
- The color stays in this tab
- Nothing is stored
RGB to CMYK at a glance
- Input
- An RGB color, or the other three
- Output
- CMYK percentages, plus HEX and HSL
- Method
- Plain sRGB conversion, no profile
- What it is not
- Not a profiled separation
- What the boxes accept
- Shorthand hex and loose syntax
- Price
- Free
- Account required
- None
- Where processing happens
- On your device
How to use RGB to CMYK
- 1
Enter the RGB color
Put the color into the RGB fields, or paste a hex code and let RGB fill itself in.
- 2
Read the CMYK
Four percentages appear on the same panel, with the swatch showing the color they came from.
- 3
Copy, then check with the printer
Copy the numbers, then confirm them against the profile your print shop works to.
Frequently asked questions
Will these numbers match my print job?
Not on their own. A press match needs the printer's own profile for that paper and ink. These are the plain sRGB numbers, which is a starting point.
Why does CMYK look duller than the screen?
Screens emit light and ink reflects it, so some screen colors have no ink equivalent. The conversion gives the nearest plain arithmetic result.
Can I load an ICC profile?
No. The panel does arithmetic on sRGB values and has no color management in it. Profiled separations belong in the software your printer specifies.
Is my color sent anywhere?
No. It is converted in this browser tab, with nothing sent to a processing server and nothing kept in an account.
What happens while I am still typing a hex code?
The box turns red and is marked invalid for screen readers, but what you typed is left exactly as typed. Nothing is silently corrected, so a half-finished code never turns into a color you did not choose.
Before you send it to print
The conversion is arithmetic on sRGB values. No paper, ink or press profile sits behind it, so the numbers are a starting point rather than what a print shop will match.
- Ask the print shop which profile they work to, and convert in the software they name.
- A rich black mixed from four inks and a plain black are different things on paper.
- Keep the RGB values as well, since screen and print versions of a brand color often differ.
- The swatch is your screen's rendering of the color, not a proof.
Full specification
| Input | An RGB color. HEX, HSL and CMYK are accepted in the same fields. |
|---|---|
| Output | Cyan, magenta, yellow and black percentages, with HEX and HSL beside them. |
| Method | Browser-side sRGB conversion and rounding. No color management is applied. |
| What it is not | A profiled separation. A print shop working to its own profile will get different numbers. |
| What the boxes accept | #abc, abc and ABC all read the same, and the RGB, HSL and CMYK boxes take rgb(12, 34, 56), hsl(220 83% 53%) or plain 12/34/56. |
| Price | Free. Supported by clearly labeled ads outside the working area. |
| Account required | No. |
| Where processing happens | In your browser tab. Your input is never uploaded. |
Keep going with the same files
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