Sitting rooms, or formal living rooms, are spaces that are often the first area in a home where family and guests are entertained and greeted. Sitting rooms are beautiful spaces for you to enjoy with your family and guests. There are many great ways to decorate a sitting room, from adding an area rug to define a conversational area. Sitting rooms are formal rooms, so formal colors such as deep red, green, gold and brown accents are perfect for the decor of your room.