UtilityLake
Color & Design Tools

RGB to CMYK

Use RGB to CMYK free in your browser. No account required; your input is processed locally in your browser.

Runs locallyYour inputs stay in your browser.
Workspace
CONVERSION LOGIC

Convert RGB to CMYK percentages

Normalize RGB channels, derive black and calculate the remaining cyan, magenta and yellow components.

RGBCMYK percentagesRuns locally
01RGB
02RGB → CMYK
03CMYK percentages

RGB 0,0,0 becomes 0%,0%,0%,100% black.

GOOD TO KNOW

Screen-to-print conversion is device-dependent in practice

The calculated percentages are useful numerically but do not replace color-managed print workflows.

PRIVATE BY DESIGN

Your content stays in the browser

Processing runs locally in the page without requiring the content to be sent to UtilityLake.

02

In short

What exactly does it do?

Normalize RGB channels, derive black and calculate the remaining cyan, magenta and yellow components.

Example?

RGB 0,0,0 becomes 0%,0%,0%,100% black.