The reflective properties of mirrors can make your room appear larger and brighter. Use neutral colors for furniture and walls. To instantly brighten up a room, try painting the walls and ceiling in a light color. Without a doubt, white or a bright whitish shade is the best color to reflect light and illuminate a space.
However, it's not the only option to illuminate a space. Just make sure to use light color palettes if you want the room to feel open and bright.