You have furniture that will allow you to do almost anything, color-wise. I LOVE the coffee table, but it is getting lost in the similar color of the floor - you need a rug there, make sure it is big enough that the front legs of the couch and chair are on it. My preference would be something with lots of color, but it must contrast with the flooring.

Once you select the rug, choose a color that is in the rug and put that on your walls. I would also recommend adding some crown molding to dress up the room, and drapes. Some lamps that tie in to the furniture or rug are needed, too.

Don't forget wall art!