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akdetrick/yiq-color-brightness.js

Last active December 25, 2015 09:39
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converts hex to yiq color brightness
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yiq-color-brightness.js
var R = parseInt(hex.substring(0,2),16),
G = parseInt(hex.substring(2,4),16),
B = parseInt(hex.substring(4,6),16);
// luminance as weighted sum of the R, G, and B values
var luma = Math.sqrt(R * R * .241 + G * G * .691 + B * B * .068);
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