Pantone Approximator
Find the nearest PANTONE® coated swatches to any RGB colour.
Overview
The Pantone Approximator takes a sRGB hex and returns the closest swatches from the PANTONE Solid Coated colour library. It surfaces the top three matches with their Pantone code, the reference hex Pantone publishes for screen preview, and the perceptual distance to each.
It is a starting point for brand managers preparing print spec sheets, agencies handing off colours to a printer, and developers building a styleguide that needs both a web hex and a print Pantone callout for each token. The result is an approximation only — final colour matching always relies on a physical chip and a calibrated press.
How it works
The Pantone Solid Coated library is stored as a table of code-to-reference-hex mappings using the values Pantone publishes for digital preview. Each entry is precomputed in OKLab. The input hex is converted to OKLab and compared against every entry by Euclidean distance, with the top three closest swatches returned.
OKLab gives a perceptually meaningful "closest" answer that aligns with how a viewer would rank candidates visually. The reported distance lets you decide whether the match is genuinely close or just the nearest of a bad bunch.
Examples
#dc143c → PANTONE 186 C (close, ΔE 2.4)
#3366cc → PANTONE 2728 C (close, ΔE 3.1)
#ff6600 → PANTONE Orange 021 C (close, ΔE 4.0)
#1abc9c → PANTONE 3275 C (ΔE 5.6)
FAQ
Why is this only an approximation?
Pantone swatches are mixed inks viewed under controlled light. Their digital previews are a single sRGB hex that cannot capture the metallic, fluorescent or out-of-gamut character of many Pantone colours. Always confirm with a physical chip.
Is the Pantone library copyrighted?
The Pantone Matching System and the Pantone trademark are owned by Pantone LLC. The approximator surfaces published reference hexes for design preview only; for production print, use the official Pantone Color Manager software.
Which Pantone library does the tool use?
The default is Solid Coated, the standard for print spec sheets. Other libraries (Solid Uncoated, Process, Pastel + Neon) follow different reference hexes and are not covered here.
Can I match a Pantone to a Tailwind colour?
Run the Pantone reference hex through the Tailwind color finder to get the closest Tailwind token, then sanity-check against your brand guidelines.