Studio dweller? Think in "zones." While you can't put up a wall (nor have the space to), you can still treat your open-concept floor plan as separate rooms. Here, stylist Shana Ecker placed an open bookshelf between the "bedroom" and "living room".
Bathroom - white subway tile, white vintage hex tile, dark grout, brass fixtures. https://www.subwaytileoutlet.com/products/White-Ceramic-Subway-Tile.html#.VfjgKhFViko
I like the wall color & the sectional & the floor & the addition of wicker + the curtains, rug & throw but I'd want colorful pillows & some accessories.