The window wall looks like it extends out into the room... What about painting this wall the duck egg blue that you refer to. Push the bed down the wall that it is currently against... Centering it on the wall space. Add lots of throw pillows to the bed, a big piece of art over the bed and a large area rug in front of the bed to soften the tile floor. Install a chest and funky mirror on the wall where the head of the bed is currently.