zekrom-vale

function getAvColor (img) {
  var canvas = document.createElement('canvas'),
      context = canvas.getContext && canvas.getContext('2d'),
      rgb,
      pixelInterval = 5, // Rather than inspect every single pixel in the image inspect every 5th pixel
      count = 0,
      data, length,
      i = -4;

  // return the base colour for non-compliant browsers