rgb to cmyk

Convert RGB to CMYK

RGB is emissive and common on the web; CMYK is subtractive and appears in print workflows. The mathematical conversion helps ideation, not ICC profiles.

Approved intentConvert a web RGB color to approximate CMYK.

How to use the presetThe widget below already starts with `rgb(0, 250, 154)`. The CMYK row shows percentages computed from sRGB.

colorConverter.inputLabel

HEX: #00fa9a
HEXA: #00fa9aff
RGB: rgb(0, 250, 154)
RGBA: rgba(0, 250, 154, 1)
HSL: hsl(157, 100%, 49%)
HSLA: hsla(157, 100%, 49%, 1)
HSV: hsv(157, 100%, 98%)
HSVA: hsva(157, 100%, 98%, 1)
CMYK: cmyk(100%, 0%, 38%, 2%)
LAB: lab(87.34, -70.69, 32.46)
XYZ: xyz(40.014, 70.699, 42.103)

colorConverter.privacyNote

Limits of computed CMYK

The tool uses the direct K = 1 - max(R,G,B) formula, useful for quick reference.
For real print work, ICC profiles and proofs are still required.

RGB → CMYK examples

Black

Input: rgb(0, 0, 0)
Expected output: cmyk(0%, 0%, 0%, 100%)

Simple edge case.

Web red

Input: rgb(255, 0, 0)
Expected output: cmyk(0%, 100%, 100%, 0%)

Classic RGB primary example.

Frequently asked questions

Can I send this CMYK to a print shop?

Use it as a reference. For production, convert with the ICC profile required by the print shop.

Can conversion change appearance?

It can. Some RGB colors are outside a print CMYK gamut.