Lighter Days
If your home interior is gloomy, it maybe because of lack of windows, in this case, you may consider installing a skylight. It may be because of lack of appropriate lighting. You may install additional light bulbs or lamps, or you may replace yellow light bulbs with compact fluorescent light bulbs which are more energy efficient and are brighter.
Another consideration is changing the color of your wall paint. Preferable colors are light green, light shades of flesh, yellow or pink. Some prefer blue, although it is associated with depression. Neon and flashy colors may also be used for bedrooms and bathrooms. Living rooms, dining area and kitchens look good in nature colors. If you want it simple, paint your walls white, then put up pictures in frames and other wall decors to add life to your walls.