I wouldn't add a border. Everything doesn't need a border. The quilt will tell you; sometimes a border, sometimes a border on only the top and bottom; sometimes a border on only the sides . . . and sometimes no border at all! Your Wonky Houses is absolutely gorgeous! I wouldn't add a thing. I'd try to fiend teal blue fabric as close to your background as possible and bind it. Trust me on this. You won't go wrong!