Hi! I am looking to add some blue ombré wall paper to my this wall in my home.

As the picture shows the wAll ends at the rock fireplace and the door leads to a hallway.

My question is: do I wrap wallpaper thru hallway and end at rock wall? Do I carry wallpaper on the wall and end at rock? Or since the paper near ceiling would fade to white, so I just paper the wall behind mirror, stopping at door way, leaving small wall by fireplace white?

Thanks for your thoughts!!