Rooms go quieter when soft sea-blue is this sure of itself. A vintage-style travel poster of Monaco’s Oceanographic Museum, with a coral-pink clifftop building, harbour boats and palm trees against a wide pale sky. The room gains a holiday feel without going theme-park; the blue cools a warm room down, the pink keeps it friendly. Hang it in a hallway, above a console, or in a study where it can be seen up close. It pairs nicely with pale woods, rattan, linen and a single terracotta pot. Avoid pairing it with heavy dark florals or busy patterned wallpaper it wants a little breathing room. Stretched canvas on a wooden frame, ready to hang straight from the box.