Just stick to the 60/30/10 guideline and you should be fine. Your wallpaper has the same ratio: brown base, cream and the turqouise accents. Keep to the same balance.

Beautiful!

Here's a Sherwin Williams "read" on the wallpaper colors. I think you could use this for a feature wall, but maybe not behind the bed. The bed stands on its own and doesn't need any more busy-ness around it with the "action" of the tufting. Try the paper in an adjoining reading nook, dressing room, bath or the fireplace area, if you have one. Then be subtle with the paint color on the other walls and keep drapery simple and matched to the wall paint. You might find a spot to add a chaise, ottoman or dressing chair in the turquoise blue silk.

I love the drama the wallpaper and the bed is neutral, so I think you would be fine putting the bed in front. But keep the accessories next to the bed and wallpaper neutral, they can add sparkle or shine but no bright turquoise lamps etc. You can pull in smaller pops of the turquoise like accessories for the dresser or a small accent pillow or throw for the bed.

I would not put the paper behind the bed just because the headboard rises so high. It would look a bit like the headboard were blocking things too much. Use the wallpaper on a wall with smaller furniture, maybe the wall your dresser is against, and put a neutral behind the bed and accent it with wall art in turquoise, or turquoise curtains on the windows.

I think the wall paper is stunning! And I love the turquoise and brown look. You room is going to be fabulous. :)