We've used a similar corner shelving unit to create space in a small 7 by 9 ft room. It's a great, easy shelving solution for small spaces (although installing it was a bit tricky as the walls weren't plumb.
Painted back wall navy and the rest of the walls a slightly darker shade of khaki/tan than the original color. Added dark brown floating shelves to incorporate my bronze bath accessories. The wall that has the door has about a foot