relative-luminance
npm install relative-luminance
Calculate the relative luminance of an RGB triplet color.
api
luminance(rgb)
Given a 3-element array of R, G, B varying from 0 to 255, return the luminance as a number from 0 to 1.
example
var luminance = require('relative-luminance');
var black_lum = luminance([0, 0, 0]); // 0