rgb-lab-conversion

Convert rgb values to Lab values the photoshop way. Currently supported color profiles:

• Adobe RGB (1998),
• eciRGB v2
• sRGB IEC61966-2.1

Install

Install the package as npm package. Provided are a umd-formatted file in the dist folder to require or just read and an es-module in the module folder to import.

Usage

Once included in your setup, the variable rgbLabConversion is available. To calculate the Lab values:

let rgbTriplet = [52, 255, 51]
let iccProfileName = 'AdobeRGB1998'
let labTriplet = rgbLabConversion.rgb2Lab( rgbTriplet, iccProfileName )

There are also methods for the seperate conversion steps:

let rgbTriplet = [228, 160, 211]
let iccProfileName = 'eciRGB_v2'
let xyzTriplet = rgbLabConversion.rgb2XYZ( rgbTriplet, iccProfileName )
let labTriplet = rgbLabConversion.XYZ2Lab( xyzTriplet )

In all calculations we start off with unmanaged rgb values. Whitepoint and conversion matrices are corrected for the D50 illuminant.

Demo

Drag and drop .../rgb-lab-conversion/demo/calculator.html or .../rgb-lab-conversion/demo/proof.html in a browser window