HEX to CMYK Converter
Translate an RGB screen color into calculated CMYK percentages.
Estimate CMYK percentages from an RGB color
A HEX color stores red, green, and blue channel values for additive screen display. CMYK describes cyan, magenta, yellow, and black proportions for subtractive print workflows. This converter expands shorthand HEX when needed, normalizes the RGB channels, separates the shared black component, and reports the remaining three components as percentages. A swatch displays the original HEX color so input mistakes are easier to notice.
The default color is pure red, written as #ff0000. Its calculated result is 0 percent cyan, 100 percent magenta, 100 percent yellow, and 0 percent black. Pure black produces zero for the three color channels and 100 percent black, avoiding division by zero in the general formula. Values are shown to six significant figures when a mixed color requires decimals.
Treat the result as a starting point for print
Conversion and preview rendering happen entirely in your browser. The calculation is a device-independent mathematical estimate, not a color-managed proof. Real printed appearance depends on the target CMYK profile, ink limits, printer, substrate, lighting, and rendering intent. For brand production or press work, convert with the printer's ICC profile and evaluate an approved proof instead of relying only on generic percentages.
Frequently Asked Questions
How are CMYK values calculated from HEX?
The tool normalizes RGB channels, finds the black component, and derives cyan, magenta, and yellow from the remaining range.
Will the printed color match my screen?
Not necessarily. A mathematical conversion cannot model a printer, ink set, paper, or ICC color profile.
Does shorthand HEX work?
Yes. Three-digit values are expanded by repeating each digit before conversion.
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