A bathroom this pared back can take one serious warm brown. The white background disappears into tiled and painted walls, so all you notice is the grinning dinosaur and the bubbles floating above him. It gives a plain, practical room a bit of humour without adding clutter or colour you have to plan around. Hang it above the bath, beside the basin, or low on a kids’ bathroom wall where small people actually look. Keep the company simple: white towels, chrome or brushed taps, pale wood, a woven basket. Skip busy patterned wallpaper behind it and avoid crowding it with strong colour prints the joke lands best with quiet space around it. As a canvas the edges sit flush to the wall for a softer, frame-free look.