PlayerChat Problem

package blue.future.test.event.player;

import org.bukkit.ChatColor;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.AsyncPlayerChatEvent;

public class PlayerChat implements Listener {

	@EventHandler
	public void onPlayerChat(AsyncPlayerChatEvent event) {
		Player player = event.getPlayer();
		String message = event.getMessage().toLowerCase();

		if (message.contains("blue")); {
			event.setCancelled(true);
			player.sendMessage(ChatColor.BLUE + "Blue Is Cool B)");
		}
	}
}