docs: function (fill) {
  		var markerOptions = this.options.marker,
  			fillOpacity = pick(markerOptions.fillOpacity, 0.5);
  		
  		// When called from Legend.colorizeItem, the fill isn't predefined
  		fill = fill || markerOptions.fillColor || this.color; 
  		
  		if (fillOpacity !== 1) {
  			fill = Color(fill).setOpacity(fillOpacity).get('rgba');
  		}
  		return fill;
  	}