ColorMe

//Command Exicuter Class

public class ColorMe implements CommandExecutor {

	  public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
 	        if (sender.hasPermission("meatie.color")) {
 	                	  ChatColor.valueOf(args[0].toUpperCase());
	    	                	sender.sendMessage("You'r Name color is now " + args[0]);
	    	                      Bukkit.getServer().dispatchCommand(Bukkit.getServer().getConsoleSender(), "scoreboard teams option " + sender.getName() + " color " + args[0]);
 	        	}
 	        return true;
	  }
}

//Listener Class

public class ColorMeLogin implements Listener {
	@EventHandler
	public void PlayerJoin(PlayerJoinEvent event) {
	    Player player = event.getPlayer();
        if(Bukkit.getScoreboardManager().getMainScoreboard().getTeam(player.getName()) == null){
        Bukkit.getServer().dispatchCommand(Bukkit.getServer().getConsoleSender(), "scoreboard teams add " + player.getName() + " " + player.getName());
        Bukkit.getServer().dispatchCommand(Bukkit.getServer().getConsoleSender(), "scoreboard teams join " + player.getName() + " " + player.getName());
        Bukkit.getServer().dispatchCommand(Bukkit.getServer().getConsoleSender(), "scoreboard teams option " + player.getName() + " color GREEN");}
	}
}


//Main Class:  (Put This In Your Main Class)

  public void onEnable() {
	    Bukkit.getPluginManager().registerEvents(new ColorMeListiner(), this);
	      getCommand("color").setExecutor(new ColorMe());
	  }

//Plugin.yml (Put This In Your Plugin.yml)
   color:
     description: Set Name Color.
     usage: /color