Choosing Paint Colors for the Den

This is the Den/Living Room on the second floor of the house. We only need to paint and decorate the space. We seem to spend the most amount of time in this room so it would be nice to get it fixed up before the holidays. I was pondering painting the walls a green shade and the modeling white which will be consistent throughout the house. Check out some of my green wall inspiration here. The room is kinda dark and doesn't get much sunlight till late in the day. So many choices! You can see my ugly brown sofa in the photo below. The sofa has to stay until our money tree starts growing again next Spring! I guess its fine. Super cozy but I hate that the shape is so heavy looking.