RGB to Pantone Converter: Find Your Nearest PMS Match

How to use the rgb to pantone converter

1. Enter the red, green and blue channel values, each between 0 and 255.
2. The converter calculates the CIELAB coordinates of your input color using the sRGB D65 standard.
3. It compares those coordinates against every Pantone solid coated swatch and ranks them by CIE76 deltaE.
4. Review the nearest PMS number, its hex equivalent, the deltaE score and a plain closeness label.
5. Check the two alternate matches below if you need a slightly warmer or cooler option.

How the rgb to pantone conversion works

The converter first linearizes each sRGB channel by dividing by 255 and applying the inverse companding curve. Those linear values are then transformed into CIE XYZ tristimulus values using the standard sRGB matrix under the D65 illuminant. Finally, XYZ is mapped to CIELAB (L*, a*, b*) coordinates.

To find the nearest Pantone match, the tool computes the CIE76 deltaE between the input color and every swatch in the dataset. The formula is straightforward: deltaE = sqrt((L1 - L2)^2 + (a1 - a2)^2 + (b1 - b2)^2). For example, converting RGB 0, 114, 198 yields a CIELAB value that sits closest to PMS 300, producing a very small deltaE.

Understanding the closeness labels

DeltaE scores tell you how far apart two colors are in human perception. This rgb to pantone color converter uses four plain labels to make the numbers easier to interpret:

• Exact: deltaE under 1. The screen colors are virtually indistinguishable.
• Very close: deltaE under 3. Only a trained eye would spot the difference side by side.
• Close: deltaE under 6. Noticeable on close inspection but generally acceptable for digital mockups.
• Approximate: deltaE 6 or higher. The match is the best available in the dataset, but the visual gap is clear.

Because monitors vary widely, always treat these labels as guidance rather than guarantees.

Screen approximations versus physical guides

The Pantone numbers returned here are screen approximations derived from sRGB hex equivalents of PMS solid coated swatches. They are not official Pantone values. Monitor calibration, ambient lighting and display technology all shift how a color appears on screen, meaning an exact deltaE of zero still might not match a printed chip.

For any print production work, you must verify colors against a physical Pantone guide. If you already have a PMS number and need its screen equivalent, use the pantone to rgb or pantone to hex tools. To start from a hex code instead of separate channels, try the hex to pantone converter. For CMYK workflows, the cmyk to pantone page handles that path directly.

Pantone is a trademark of Pantone LLC and this site is not affiliated with or endorsed by Pantone LLC. The values are screen approximations of the PMS solid coated library (907 colors), not official Pantone data.

Common reference conversions

Here are several well-known Pantone solid coated numbers alongside their typical sRGB representations. These serve as quick anchors when testing an rgb color to pantone lookup.

Entering any of these RGB triplets will return the corresponding PMS number as the top match.

Why use CIE76 instead of simple RGB distance

A naive approach to finding the nearest rgb to pms match would calculate the Euclidean distance between the R, G and B channels directly. However, the sRGB color space is not perceptually uniform. A difference of 20 units in the blue channel looks much larger to the human eye than the same 20 unit difference in the green channel at certain brightness levels.

CIELAB was designed specifically to solve this problem. By converting to L* (lightness), a* (green to red) and b* (blue to yellow) axes, the CIE76 deltaE formula produces a single number that correlates closely with perceived difference. This ensures the converter picks the Pantone swatch that actually looks closest to your input, not just the one with the smallest mathematical gap in raw channel values.

Worked examples