olvado

function getAverageColourAsRGB (img) {
  var canvas = document.createElement('canvas'),
      context = canvas.getContext && canvas.getContext('2d'),
      rgb = {r:102,g:102,b:102}, // Set a base colour as a fallback for non-compliant browsers
      pixelInterval = 5, // Rather than inspect every single pixel in the image inspect every 5th pixel
      count = 0,
      i = -4,
      data, length;

  // return the base colour for non-compliant browsers