What will you be doing I this room? Relaxing, sleeping, working. How do you want to feel? Colour can enhance your decor by how it makes you feel - figure this out and then select it.

Paint it a neutral light tone of your choice. With the dark wood and furniture I think you will be happy. Love the space. I have a similar space and when there is so many different walls with different colors it didn't work. When I painted it one color it became more unified and settled. Easier to paint one color as well!