Place the turquoise sofa near a living wall featuring a neutral color, such as white or ecru, that it won't compete against; the colorful couch will pop against a light background.
Accent the turquoise with dark wood furniture, such as a mahogany side table and coffee table set, which will help to ground the vibrant color. Place a turquoise glass vase filled with a bouquet of white and yellow flowers in the center of the coffee table.
Hang a vintage, gold-framed mirror or piece of artwork on the wall behind the turquoise sofa; the rich gold tone will add warmth to the space. Install turquoise sconces filled with white pillar candles on either side of the mirror or artwork to create a cohesive look.
Enhance the sofa with coordinating textiles. Place white throw pillows featuring gold and turquoise designs, such as birds or flowers, on the sofa. Fold a white cashmere blanket over the top of the sofa as a soft touch.