Donaldson R F HEX ⇄ CMYK Converter
Convert a web colour code to CMYK for print — or CMYK back to HEX — with a live preview.
C · M · Y · K
A note on CMYK accuracy
HEX and RGB describe light (screens); CMYK describes ink on paper. This converter uses the standard mathematical formula — K = 1 − max(R, G, B), then C = (1 − R − K) ÷ (1 − K) and likewise for M and Y — which is exact for the formula but does not account for the colour profile of a particular printer and paper. Bright screen colours, such as vivid blues and greens, often cannot be reproduced in ink at all, so a print shop's proofs (which use ICC colour profiles) will look duller than what you see here. Use these values as a starting point, and ask your printer for their preferred CMYK values or profile for colour-critical work.