All colours from white to beige to grey and black - Burts have them all!
For a living room you want a mixture of comfort and wearability. The modern day lounge is used not just as a sitting room but also as a hub for entertainment, usually with the TV being a focal point.
The most popular colours are beiges and more recently shades of grey. A plain carpet is very popular as it gives a "blank canvas" that can be built on with soft furnishings and rugs to give the ideal look to your lounge.