Converting RGB to CMYK
RGB describes a color as amounts of red, green, and blue light from 0 to 255 — the native model of every screen and camera. CMYK is the subtractive, four-ink model used by printers, expressed as cyan, magenta, yellow, and key (black) percentages.
The key thing to understand converting between RGB and CMYK is that CMYK is a print (subtractive, ink-based) model while RGB is a screen (additive, light-based) model. The conversion is a close mathematical approximation — the two gamuts don't overlap perfectly, so a color that looks vivid on screen can print duller. For accurate print work, always confirm against your printer's ICC profile or a physical proof.
This RGB to CMYK converter works instantly in your browser: type or pick a RGB color and the CMYK value updates live, along with every other common format so you can copy whichever you need. Nothing is sent to a server, and it is completely free with no limits.
When do you need CMYK?
Reach for CMYK when you are working on print production, where ink — not light — creates the color. Designers and developers routinely convert RGB to CMYK to move a color between a web workflow and a print one without eyeballing it. If you want to grab a color straight from an image instead of typing it, try our color picker from image, or build a full scheme with the palette generator.
You can also convert in the other direction with our CMYK to RGB converter, or jump to any other format — the tool always shows HEX, RGB, HSL, HSV, and CMYK side by side.