code: function (color, elem, prop) {
  			if (color && color.linearGradient) {
  				// Pick the end color and forward to base implementation
  				color = color.stops[color.stops.length - 1][1];
  			}
  			return SVGRenderer.prototype.color.call(this, color, elem, prop);
  		}
docs: Take a color and return it if it's a string, do not make it a gradient even if it is a
  gradient. Currently canvg cannot render gradients (turns out black),
  see: http://code.google.com/p/canvg/issues/detail?id=104
  
  @param {Object} color The color or config object