Our master bedroom gets a lost of northwest facing light which we love during the day but we need complete black to sleep at night. The wall with the bed has 4 windows and I am afraid putting curtains along with the blinds will make that wall too busy. Any advice on what window treatments we should get please? If blinds only, would Roman shades be better or cellular blinds with top down functionality?

Also, any recommendations on wall colors? Making the wall behind the bed the statement wall with windows on sides etc, wouldn't that be too much going on on that wall?