Fung shui masters who take into account aspects of modern living know the colour of the walls in a home has an effect on its occupants. For instance, it is not recommended to paint the northern sector of your home bright red this year because that colour (representing the fire element) will stimulate the troublesome 'five yellow' earth energy that is present there.
Red is extremely yang, which is why it should not be used for yin areas, such as bedrooms, otherwise occupants will experience sleeping difficulties. Using red for the study may result in concentration problems. While red can be used in yang sectors such as the living and dining rooms, excessive use will cause occupants to feel irritable, resulting in arguments. Painting a feature wall is acceptable but calculations involving the orientation of the property and location of the room need to be taken into account.
In contrast, the colours black and blue, which represent water, are extremely yin; excessive use of them may cause occupants to feel lethargic. For instance, you should not paint the walls and the ceiling of your child's bedroom black to simulate the night sky, otherwise he or she may feel drained. The water element also represents romance and using black and blue may cause romantic complications.