North facing rooms have a quietly atmospheric quality of light. It is soft, even, and a touch cooler than the warmer light in south facing spaces, which influences how every colour behaves in the room. The sofa, as the largest visual piece, deserves careful thought before any purchase. This guide explains how to read the light first, then build a colour choice around it. We look at why warmer tones often work better in this kind of space, how cool greys can sometimes feel flat, and when deeper shades such as forest green or terracotta truly come into their own. Texture is given its own section, since brushed linen, bouclé, and chenille all read richer under softer light than smooth weaves. Practical advice is included on testing swatches in the actual room before committing. A short FAQ rounds off common decisions about dark sofas and walls. We finish with practical pointers for British homes....