White or bright colors are ideal for narrow rooms to make them appear more spacious. But, if you want to add a touch of dark color, you can try something like the room interior design image above!

Instead of painting the entire wall black or dark grey, you can combine it with white wall paint on the other side. This will give a unique impression while not making the room look narrower.

Installing a wall mirror that is large enough is also one of the tricks for decorating a narrow room, you know! The mirror reflection will create a visual illusion that makes the small room appear more spacious.