I think it will go back to the normal colors when it's taken care of adequately. I've never seen a healthy LSN with such coloration. In fact, all LSN look the same when they are happy and healthy. I think it has to do with its overall rather poor state.
as soon as i can get him to stay still so i can get more pics i will post them, he must have been stressed by the rays, he got a nice solid black coloration now.