A living room this pared back can take one serious olive green. The colour does the heavy lifting here, so a plain wall stops feeling like a gap and starts feeling deliberate. Hang it on its own above a low sideboard or between two windows, where the flat green has room to sit without competing. It gets on well with pale wood, cane, cream linen and simple stoneware, and it sharpens up a room that has drifted a bit too beige. Keep the wall around it clear small framed photos or busy patterned pieces will fight the thick black outlines rather than support them. One strong piece, plenty of breathing space. On fine-art paper the flat colour stays even and the linework keeps its crisp edge.