A print supplier sends back a brand sheet that says Pantone 186 C. The website needs a number the browser understands. That translation is what this page does, and the honest version of it comes with a caveat worth reading once.
What the RGB number here actually is
Pantone colors are mixed inks, not recipes made from red, green and blue light. There is no equation that turns a spot ink into screen channels, because the two systems make color in opposite ways: ink subtracts light bouncing off paper, a monitor adds light from three emitters. The RGB triplet you get for any chip is a published sRGB equivalent, the value Pantone and brand guidelines circulate for digital use, not the output of a formula run on the fly.
That matters for a practical reason. Converters that calculate a value from the code itself produce numbers that look plausible and match nothing. This one holds a fixed table of 173 chips, 145 from Solid Coated and 28 Fashion TCX colors, and returns a chip only when the code is in that table. Ask for something outside it and the tool says so, then offers the nearest numbered codes rather than inventing a swatch.
Coated, uncoated and TCX are three different books
The suffix on a Pantone code is not decoration. It names the substrate the ink was measured on, and the same base ink reads differently on each one. Coated stock holds ink on the surface, so colors stay saturated. Uncoated stock absorbs it, so the same mix dries duller and lighter.
| Suffix | Book | Where it shows up | In this tool |
|---|---|---|---|
C | Solid Coated | Packaging, brochures, most brand guides | Included, 145 chips |
U | Solid Uncoated | Letterheads, uncoated cartons, newsprint | Not included |
TCX | Fashion, Home and Interiors, cotton | Textiles, product design, Color of the Year | Included, 28 chips |
TPG | Fashion, Home and Interiors, paper | Mood boards, print mockups of textile colors | Not included |
Old brand documents sometimes carry TPX, the paper edition that TPG replaced in 2015. If a brand sheet quotes a TPX number, the numeric part still matches the TCX chip of the same name, so searching the digits finds it here.
Reading the three-ground strip above
Brand teams sign off spot colors on a printed chip, held under decent light, against white paper. Websites break all three of those conditions at once. The strip puts the chip on white, mid grey and near black so the weak spots show up before the color reaches a live page.
- Dark navies and forest greens such as 282 C and 357 C pass easily on white and fail as text on a dark section. They belong to backgrounds and headers, not to body copy on a dark ground.
- Yellows in the 100 to 130 range hit contrast ratios near 1.2:1 on white. As text they are unreadable at any size, which is why brands that own a yellow set it on a dark plate.
- Mid-tone chips around 50 percent lightness are the ones that vanish against grey. If a design system has grey cards, check the chip there first.
The two ratios shown follow the WCAG relative luminance formula, the same one behind the contrast checker. Body text needs 4.5:1, large text and interface elements need 3:1.
Where the screen value drifts from the printed chip
Spot inks reach colors sRGB has no room for. Pantone 802 green and the whole neon range sit well outside the triangle a standard monitor covers, so their screen equivalents come back muted next to the ink. Metallics behave worse: 871 gold is a metallic pigment whose appearance depends on the angle light hits it, and no single RGB triplet describes that. What gets shipped for metallics is a flat brown-gold that reads as beige on screen.
A useful working rule. If the printed piece and the screen version sit side by side in the same room, such as a trade show banner next to a tablet, expect complaints and budget time for a manual tweak. If they are never seen together, the published sRGB value is close enough and consistency across your own pages matters more than matching the ink.
Monitor calibration adds its own drift. The same hex renders warmer on a wide-gamut display in P3 mode than on an office panel, and neither is wrong. That is one more reason to treat the RGB value as the agreed reference number for the brand rather than a promise about what any given screen shows.
What this converter leaves out
The full Pantone system runs past 2,100 solid colors plus several thousand fashion and interiors shades. Only the 173 most commonly requested chips are here, chosen from the ones that turn up in brand guides and print quotes. The complete library is licensed, and a free page that claimed to hold all of it would be publishing numbers it has no right to and, in most cases, made up.
Metallics in the 87x range, the 801 to 814 neons, and the pastels and Neons book are outside the set for the gamut reasons above. Uncoated equivalents are outside it too, since a U chip is a genuinely different color rather than a variant of the coated one, and guessing at it would be worse than saying nothing.
Going the other way, from an RGB or hex value to the closest Pantone chip, is a search problem rather than a lookup. That work belongs to the RGB to Pantone converter, which measures distance across a candidate set instead of reading a fixed table.
