Plugin Help Color Player's Name

How to set the name of a player of an arraylist in color. For example the players of arraylist 'BlueTeam' have their names in Blue.

 

I add the Player to the arraylist when he click on sign . Can You give me a line of code to set the Name of the Player in color?

 

@timtower he probably wants it over their head and whatnot.
@0verFull Use Scoreboard teams. Just add everyone in it to a Team and use Team#setPrefix("§b") or §9 or §1 or whatever.

 

And how to make scoreboard team?

 

@timtower Hey, it works.
@0verFull

Code:

Scoreboard board = Bukkit.getScoreboardManager().getMainScoreboard();
Team blue = board.getTeam("blue") == null ? board.registerNewTeam("blue") : board.getTeam("blue");
blue.setPrefix("§b");

 

Can use this with arraylist ? Or how to add Player to the team ?

 

@0verFull

Code:

//list is the list of players
for (Player p : list) {
    blue.addPlayer(p);
}

 

Ok big thanks @pie_flavor.

@pie_flavor Can You help me for this plz ?
http://bukkit.org/threads/java-lang-nullpointerexception.342196/

EDIT by Timtower: merged posts