Against terracotta, the deep blue reads less sweet, more deliberate. Hang this desert motel scene and a quiet wall suddenly has a story in it: a night sky, a lit doorway and a figure deciding what to do next. The flat colour does the work, so the room stays calm while the wall gains personality. It sits well above a sofa, a low sideboard or along a hallway where people pass at eye level. Pair it with warm wood, tan leather, black metal and one or two plain cream ceramics. Keep the surrounding wall plain and skip busy patterned wallpaper or heavy gilt-framed pieces nearby, which fight the clean lines. On fine-art paper the flat colours stay crisp and the grainy texture stays subtle.