How do I change/color the name above a player's head?

I want to make a minigame with teams, and each player will have their name colored to indicate what team they are on. I am talking about the name that players see on top of their heads. I cannot use a Scoreboard, since each player is already assigned their own scoreboard.

Edit: I am using Bukkit 1.8.8.

 

I can't remember which method I used but one of these methods changed the color of the nametag and a heads up I don' think it's possible to change a player's actual name but just the color. I've looked for a very long time and the closest I ever got was changing just the color, here are the methods.

Code:

private void setPlayerName(Player p, String nick) {
        EntityPlayer changeName = ((CraftPlayer)p).getHandle();
        changeName.displayName = ChatColor.translateAlternateColorCodes('&', nick);
        for (Player all : Bukkit.getServer().getOnlinePlayers()) {
            PlayerConnection connection = ((CraftPlayer)all).getHandle().playerConnection;
            connection.sendPacket(new PacketPlayOutNamedEntitySpawn(changeName));
        }
    }
   
    public void changeName(Player p, String newName){
        for(Player pl : Bukkit.getOnlinePlayers()){
            if(pl == p) continue;
            //REMOVES THE PLAYER
            ((CraftPlayer)pl).getHandle().playerConnection.sendPacket(new PacketPlayOutPlayerInfo(EnumPlayerInfoAction.REMOVE_PLAYER, ((CraftPlayer)p).getHandle()));
            //CHANGES THE PLAYER'S GAME PROFILE
            GameProfile gp = ((CraftPlayer)p).getProfile();
            try {
                Field nameField = GameProfile.class.getDeclaredField("name");
                nameField.setAccessible(true);

                Field modifiersField = Field.class.getDeclaredField("modifiers");
                modifiersField.setAccessible(true);
                modifiersField.setInt(nameField, nameField.getModifiers() & ~Modifier.FINAL);

                nameField.set(gp, ChatColor.translateAlternateColorCodes('&', newName));
            } catch (IllegalAccessException | NoSuchFieldException ex) {
                throw new IllegalStateException(ex);
            }
            //ADDS THE PLAYER
            ((CraftPlayer)pl).getHandle().playerConnection.sendPacket(new PacketPlayOutPlayerInfo(EnumPlayerInfoAction.ADD_PLAYER, ((CraftPlayer)p).getHandle()));
            ((CraftPlayer)pl).getHandle().playerConnection.sendPacket(new PacketPlayOutEntityDestroy(p.getEntityId()));
            ((CraftPlayer)pl).getHandle().playerConnection.sendPacket(new PacketPlayOutNamedEntitySpawn(((CraftPlayer)p).getHandle()));
        }
    }

 

This unfortunately did not work. I forgot to mention that I am using 1.8. I was thinking if there is a way where I can pass in a singular Team object into each player's scoreboard, so each player's scoreboard references the same Team object. Would I have to use reflection? This is because when I do getTeams from the Scoreboard object, it returns an immutable set.

Edit:
So, I was working on my code for a couple of hours, and I figured out, that I can create a new class that houses a new Scoreboard object, which then houses 4 teams. Then, I have a method in that class that uses Reflection to get down to NMS Scoreboard to add the teams to the sets. If anyone has a better solution, please tell me. Otherwise, this works, for now.

Code:

public class WallsScoreboardSharedTeams implements ScoreboardSharedTeams {
    Scoreboard scoreboard;
    HashMap<String, Team> teams;
    /**
     * Uses Reflection to add a shared bundle of teams to each player's scoreboard.
     */
    public void addTeamsToScoreboard(Scoreboard scoreboard) {
        for (Team team : teams.values()) {
            Class teamClass = team.getClass();
            Class scoreboardClass = scoreboard.getClass();
            try {
                //Get the nms ScoreboardTeam object
                Field teamField = teamClass.getDeclaredField("team");
                teamField.setAccessible(true);
                ScoreboardTeam nmsScoreboardTeam = (ScoreboardTeam) teamField.get(team);
               
                //Get the nms Scoreboard object
                Field boardField = scoreboardClass.getDeclaredField("board");
                boardField.setAccessible(true);
                net.minecraft.server.v1_8_R3.Scoreboard nmsScoreboard = (net.minecraft.server.v1_8_R3.Scoreboard) boardField.get(scoreboard);
                Class nmsScoreBoardClass = nmsScoreboard.getClass().getSuperclass();
                Field nmsScoreboardTeamsbyName = nmsScoreBoardClass.getDeclaredField("teamsByName");
                nmsScoreboardTeamsbyName.setAccessible(true);
                HashMap<String, ScoreboardTeam> teams = (HashMap<String, ScoreboardTeam>) nmsScoreboardTeamsbyName.get(nmsScoreboard);
                teams.put(team.getName(), nmsScoreboardTeam); // Put the nmsScoreboardTeam into the nms Scoreboard
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }...