Give the hallway wall one hard decision, and let everything else relax. This wide painted bay does the work: two big blocks of turquoise water and pale blue sky, a green headland in the distance, and one red roof to keep it from going flat. Hung up, the wall reads cooler and further away, which makes a narrow or boxy room feel like it has an extra window. It sits happily above a sideboard, a bed or a bench, and pairs best with pale wood, rattan, white joinery and off-white linen. Don’t crowd it with busy patterned wallpaper or a row of small dark pictures the calm comes from the empty space around it. On premium fine-art paper, the soft brushwork and grainy sky keep their painted look.