As far as color for the wall I think best would be if we would pick it together with her. There are many shades of teals and blues and I could send you gazillion boards with all the colors that she might not like.:-) Also, I think a plannked wall would look great as a focal wall behind the bed – painted with her favorite blue shade.
Accent wall: Peel and stick wallpaper
I am thinking to paint to closet doors to the same color as a striped wall on the other side. The bookshelf will be moved to the right side of the room along with the desk. Floating shelving over the desk with her personal items displayed on it. Baskets will be added to the bookshelf as wells as the bottom of the desk.