gistfile1.js

build_color_map: function(labels){
  var colors = _colors.slice(0),
      colors_c = _colors.slice(0);
      
  angular.forEach(labels, function(label){
    if(label.is_competitor){
      _color_map_c[label.label] = colors_c.shift();
    } else {
      _color_map[label.label] = colors.shift();
    }
  });
},

colorize_label: function(label) {
  //find via mapped scale
  if(label.is_competitor){
    var color = _color_map_c[label.label];
  } else {
    var color = _color_map[label.label];
  }
}