1. The color of the walls. It can be either deep blue and a delicate turquoise shade that can go into delicate shades of greens. For narrow rooms, delicate tones and light ones are suitable, such as aquamarine, blue and turquoise, and for wide space saturated blue tones, but it is worth avoiding too dark tones if you have a dark furniture — they will make the bedroom too narrow. You can use murals with sea landscapes or with a geographical map both throughout the walls and in separate places.