code

import org.bukkit.ChatColor;

import org.bukkit.command.Command;

import org.bukkit.command.CommandExecutor;

import org.bukkit.command.CommandSender;

import org.bukkit.entity.Player;

public class NameColorCommand implements CommandExecutor {

  @Override

  public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {

    // Check if the sender has OP permission

    if (!(sender instanceof Player) || !sender.isOp()) {

      sender.sendMessage(ChatColor.RED + "You do not have permission to use this command.");

      return true;

    }

    // Check if the command has enough arguments

    if (args.length < 2) {

      sender.sendMessage(ChatColor.RED + "Usage: /namecolor <player> <color>");

      return true;

    }

    // Get the target player

    Player target = sender.getServer().getPlayer(args[0]);

    // Check if the target player is online

    if (target == null) {

      sender.sendMessage(ChatColor.RED + "Player not found or is not online.");

      return true;

    }

    // Get the color argument

    String color = args[1];

    // Set the target player's name color in chat and tab list

    target.setPlayerListName(ChatColor.translateAlternateColorCodes('&', color) + target.getName());

    target.setDisplayName(ChatColor.translateAlternateColorCodes('&', color) + target.getName());

    sender.sendMessage(ChatColor.GREEN + "Successfully changed " + target.getName() + "'s name color to " + color);

    return true;

  }

}