Umm...can this many people really not see the difference in his hair color? The prince's hair is normally "Black", it has a hint of brown in it, but it's clearly black, just like a lot of black hair in real life. The prince 'dyed' his hair to make it a medium brown while out in the town. Yes when he got back to the castle it was black again, but you guys aren't paying attention to what he said. He dyed it just before going out, just to go out. The 'dying' he's doing to his hair is not the same kind as what we do, it's probably magical and easily removed. That's why his hair went back to black when he got back in the castle, it wasn't an 'ooopsie' If it was like our kinda dye, the prince wouldn't have dyed his hair just for going out to apologize, he'd have worn a wig instead, cause he wouldn't be able to undo it for a while.