The short answer
Why use CMYK to RGB?
Print specs and brand guides often give colors in CMYK only, while websites and slides need RGB or hex. This gives you a screen version of the color without opening design software.
Each channel is worked out as 255 times one minus the ink, times one minus black. Red comes from cyan, green from magenta, and blue from yellow, and black darkens all three equally. The fields start at 0, 70, 63, and 22 percent. The result shows RGB values from 0 to 255 and an uppercase hex code.
The formula has no color profile, so it does not match what Photoshop or Illustrator shows with a FOGRA or GRACoL profile. Rich blacks, such as 60, 40, 40, 100, all come out as plain black here, because 100% K alone makes every channel zero. Check a brand color against its official RGB value if one exists.
RGB to CMYK does the reverse sum, so you can check a value both ways. Solid Color can turn the resulting hex code into an image you can drop into a slide or a mockup. The result can be copied with Copy text or downloaded as a small text file, and it updates a moment after each keystroke.
Where CMYK to RGB fits
Brand guides
Turn the CMYK values from a print guide into hex for a website.
Print to slides
Match a slide color to a flyer that was designed in CMYK.
Quick checks
Preview on screen roughly how a CMYK swatch will look.
Start to finish
How to use CMYK to RGB
- 01Tap Open editor.
- 02Type Cyan, Magenta, Yellow, and Black as whole percentages from 0 to 100; the fields start at 0, 70, 63, and 22.
- 03Read the RGB values and hex code as you type, then tap Copy text or Download result.
What to expect from CMYK to RGB
| Check | What it means here |
|---|---|
| Supported input | No upload required |
| Main controls | Labeled number fields for the formula |
| Output | The answer and the values it came from |
| Working limit | No file needed; inputs are kept to realistic ranges |
CMYK to RGB tips
- The hex code is uppercase, ready to paste into CSS.
- Black at 100% gives pure black whatever the other inks are.
- No color profile is used, so expect small differences from design software.
- If the brand guide lists an official RGB value, that wins.
CMYK to RGB FAQ
Something missing? Ask us.
Will the hex code match the printed color exactly?
What values can I type?
Does CMYK to RGB upload my file?
Is CMYK to RGB free to use?
Why did CMYK to RGB fail or look wrong?
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