answer:Sitting areas (two chairs, one table), area rugs in bright colors to match your pillows. Lamps and candles help a lot, and fresh flowers, throws on the back of chairs or couches. All black inside? Like from smoke? You can use wall hangings out of some cheaper cloth that you can wash or change out once or twice a year, it would really brighten that up and make it cozy. Or, don’t laugh at me now, you can wrap the cloth around cardboard boxes of different sizes and do the whole room in a nice pattern, with silky materials or something.