Tried to brighten this room of slate blue walls that I can't paint over and dislike. Tried advice of mixing in whites & grey with blankets, rug, curtains. Want to add pics, wall shelves, pillows. I liked simple, industrial, lofty look & anything but white seems too dark. Does white/grey thing work? Also- the light is reflecting weird off the walls in the pic, they are just plain walls. Need ideas, any are welcome!