How do I convert a Pantone color to CMYK?
Look up a screen value for the Pantone color, then convert that value to cyan, magenta, yellow and black percentages. This tool does both: type PANTONE 286 C (or just 286) and it returns cmyk(100%, 68.8%, 0%, 37.3%). The numbers come from a published HEX approximation plus the standard formula, so treat them as a first draft of a process build.
PANTONE is a trademark of Pantone LLC, which has no involvement with this site. Pantone's own color finder warns that on-screen colors "are computer simulations" and that you should "consult PANTONE Publications to visually evaluate any result before utilization" (pantone.com).
Reading a brand spec sheet
Brand guidelines often list one color several ways, for example "PANTONE 286 C / CMYK … / RGB … / HEX …". If your sheet already has a CMYK line, use it: the brand owner (or their printer) chose it, and it will beat any formula. This tool is for the other case, where the sheet only gives a Pantone name and you need a CMYK starting point for a four-color job such as a flyer, a magazine ad or a digital print run.
Pantone's answer to the same question is the Color Bridge guide, which "displays a side-by-side match between the Pantone solid color on the left, and the closest CMYK simulation on the right" (Pantone support). If precision matters, that printed guide or your printer's recommendation is the reference.
The calculation, step by step
For PANTONE 286 C the table stores #0032A0, which is RGB 0, 50, 160.
- Scale each channel to 0 to 1: R = 0, G = 0.196, B = 0.627.
- Black is one minus the largest channel: K = 1 − 0.627 = 0.373.
- Cyan is (1 − R − K) ÷ (1 − K) = 0.627 ÷ 0.627 = 1.
- Magenta is (1 − 0.196 − 0.373) ÷ 0.627 = 0.6875.
- Yellow is (1 − 0.627 − 0.373) ÷ 0.627 = 0.
- Multiply by 100 and round to one decimal place:
cmyk(100%, 68.8%, 0%, 37.3%).
Pure black input (no light at all) is a special case that returns cmyk(0%, 0%, 0%, 100%); no table entry is that dark, though.
This is "naive" CMYK: it assumes ink coverage maps directly to screen brightness, with no paper, dot gain or ink limits involved. Professional workflows convert through ICC profiles that describe a specific press and paper, which produce different numbers.
Sample results
| Input | CMYK output |
|---|---|
PANTONE 186 C |
cmyk(0%, 92%, 77%, 21.6%) |
Process Blue |
cmyk(100%, 34.2%, 0%, 20.8%) |
Yellow C |
cmyk(0%, 13%, 100%, 0.4%) |
PANTONE 375 C |
cmyk(30.2%, 0%, 100%, 25.9%) |
Cool Gray 9 |
cmyk(4.9%, 2.4%, 0%, 51.8%) |
Black |
cmyk(0%, 8.9%, 15.6%, 82.4%) |
Notice the pattern: saturated colors pick up black, and the grays come out as mostly K with a faint tint. Both follow directly from the formula. For a neutral gray, many printers would rather run black only, so ask before you use those tints.
Names it accepts and rejects
The lookup ignores case and extra spaces, strips a leading PANTONE or PMS and a trailing C, reads Grey as Gray, and restores a missing leading zero, then compares what's left with the 38 table names. So pantone 186 c, 186C, PMS 186 and 186 all find 186 C, 72 finds 072 C, 032 finds Red 032 C, and Cool Grey 11 finds Cool Gray 11 C. Two kinds of input still fail:
- another library's suffix, such as
286 Uor286 CP. The message says "Only coated (C) references are in this tool's table, so Color Bridge coated (CP) colors can't be looked up." (naming the library you typed) and points to the coated swatch if the table has it. A U or CP build is a different reference from the C one, so the tool doesn't substitute it silently. - any color not in the table, such as
485 C, which shows "Enter a known PANTONE name or number, e.g. PANTONE 286 C."
The full list of accepted names, with their screen values, is on the Pantone to HEX lookup.
Related tools
To go the other way and find an ink for a CMYK build, use the CMYK to Pantone matcher. If you have a HEX or RGB value instead of a Pantone name, the HEX to CMYK converter and RGB to CMYK converter apply the same formula used here.
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