I think I would buy a carpet and curtains there that would match your living room. I wouldn't buy any tablecloth in this situation but would try to put something on the table - flowers maybe or candles that would also match the colors. Walls..uhhmm, maybe reproduction of impressionists' painitngs - they have live and bright colors that match almost everything. And on one wall might hang a picture of your family all together or other picture that you have made and you are extremely proud of.