docs: function sn_color_color(d) {
  	var s = Number(d.source);
  	if ( isNaN(s) ) {
  		return sn.runtime.colorData[d.source];
  	}
  	return sn.runtime.colorData.reduce(function(c, obj) {
  		return (obj.source === d.source ? obj.color : c);
  	}, sn.runtime.colorData[0].color);
  }