relative-luminance/dist/index.js

calculate relative luminance

var r=.2126,n=.7152,t=.0722,o=1/12.92;function u(r){return Math.pow((r+.055)/1.055,2.4)}module.exports=function(e){var a=e[0]/255,c=e[1]/255,f=e[2]/255,i=a<=.03928?a*o:u(a),p=c<=.03928?c*o:u(c),v=f<=.03928?f*o:u(f);return i*r+p*n+v*t};
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