Best color for text on a background of a given hex color

bestTextColor.js

/* 
  Variation of http://stackoverflow.com/a/11508164/1956065
  Follow up to https://twitter.com/johnjcz/status/670365691329970176
  Inspired by UI of http://www.colorhexa.com/
*/

function bestTextColor(hex) {
  hex = hex.replace('#', '');
  var bigint = parseInt(hex, 16);

  var g = (bigint >> 8) & 255;

  return (g > 50) ? '#333333' : '#FFFFFF';
}

// Or if you're really good at reading one liners
function bestTextColor(hex) {
  return (((parseInt(hex.replace('#', ''), 16) >> 8) & 255) > 50) ? '#333333' : '#FFFFFF';
}