RGB to CMYK converter — instant, exact, and copy-ready.
Quick answer: Enter RGB values and get the CMYK percentages. Use them as a starting reference for a print workflow, and always have the printer convert through the correct ICC profile for the final output.
RGB input
CMYK output
HEX
#3B82F6
RGB
rgb(59, 130, 246)
HSL
hsl(217.2, 91.2%, 59.8%)
CMYK
cmyk(76%, 47%, 0%, 4%)
Core facts
Input
RGB channels 0–255
Output
CMYK percentages + HEX
Note
Approximate — convert via ICC for print
Cost
Free
What is a RGB to CMYK Converter?
An RGB to CMYK converter turns screen color into the four-ink print model. RGB is additive (light added to black), CMYK is subtractive (ink on white paper). The tool applies the standard conversion, but note that a faithful print conversion should go through the printer's ICC profile and paper — the numbers here are a good starting point, not a guarantee.
Common Uses for RGB to CMYK Converter
Get a CMYK starting point from a screen color
Understand why a bright RGB green cannot be reproduced in ink
Sanity-check a color before briefing a printer
How RGB and CMYK relate
RGB and CMYK describe the same color in different coordinate systems. Converting between them is a matter of arithmetic, not interpretation, so the result is exact: the tool applies the standard formula and shows the value to one decimal place.
Where the rounding happens
Channel values are rounded for display. If you round a value and then convert back, you may land one unit away from the original — that is normal and invisible on screen. Keep the original code when a perfect round-trip matters.
Frequently Asked Questions
Why can't print match the screen?
RGB can emit bright, saturated light; ink can only absorb it. Some screen colors (neon greens, vivid oranges) simply cannot be reproduced in CMYK, so the conversion brings them into gamut.
Is this the same as my printer's conversion?
Not necessarily. Professional print converts through an ICC profile for the specific press and paper. Treat these values as a starting point.
What is black (K) here?
K is the black ink channel, computed as one minus the largest of the RGB components. It is kept separate to save coloured ink and produce a true neutral black.