You don’t need more decor. You need one Highland cow illustration with teeth. Six shaggy cows stand in rows on a bright blue background, each covered in orange and blue folk patterns, with stars and a single eye filling the gaps. Put it up and the wall stops being background. The blue does the heavy lifting, so the room reads brighter straight away. Hang it on a chalky off-white wall in a kids’ room, a small hallway or above a low chest of drawers, roughly at eye level. Keep the furniture plain: white or soft pink paint, pale wood, striped cotton. Skip busy wallpaper and skip a second bold print on the same wall. On fine-art paper the flat blue stays clean and even.