code: function( num ){
             var list = new ColorList();
             for( var i = 0; i < num; i++) {
                 list.add( this.getColor() );
              }
             return list;
          }
docs: Creates a {ColorList} of {TColor} based on the theme's
  ranges and balance defined by their weights
  @param {Number} num the number of colors to put in the list