Rows of matching Billy bookcases from Ikea work well here. Consider that the books and accessories offer the pop while the bookcases provide the background. (contemporary living room by Smith & Vansant Architects PC)
A sky high "dry stacked" stone fireplace is matched by an oriental rug, wall color, upholstery, and even tiered candles on the fireplace mantle. Nice recessed seats with framed art. --Love the candles on the mantle!