Get the average of colors (#123456)

colors.coffee

averaveColor = (colors) ->
    d2h = (d) -> d.toString(16)
    h2d = (h) -> parseInt(h, 16)

    r = g = b = 0
    for color in colors
        r += h2d(color.slice(1, 3))
        g += h2d(color.slice(3, 5))
        b += h2d(color.slice(5))

    r = r // colors.length
    g = g // colors.length
    b = b // colors.length

    color = '#'
    color += d2h(r)
    color += d2h(g)
    color += d2h(b)

    return color

gistfile1.js

var averaveColor;

averaveColor = function(colors) {
  var b, color, d2h, g, h2d, r, _i, _len;
  d2h = function(d) {
    return d.toString(16);
  };
  h2d = function(h) {
    return parseInt(h, 16);
  };
  r = g = b = 0;
  for (_i = 0, _len = colors.length; _i < _len; _i++) {
    color = colors[_i];
    r += h2d(color.slice(1, 3));
    g += h2d(color.slice(3, 5));
    b += h2d(color.slice(5));
  }

  r = Math.floor(r / colors.length);
  g = Math.floor(g / colors.length);
  b = Math.floor(b / colors.length);
  
  color = '#';
  color += d2h(r);
  color += d2h(g);
  color += d2h(b);
  return color;
};