Colour Meditation is used to energise the chakras (the Sanskrit word for 'Wheel').  The chakras control different functions of the mind and body and are found on a line that runs down the centre of the body (called the 'Sushumna') from the top of the head to the base of the torso.  Using colour meditation to energise the chakras balances and controls the mind and body functions to maintain and restore health.  Each chakra is represented by a colour.  This colour is it's energy and what you focus on in your meditation.  You may find yourself drawn to one colour more than others.  The energy vibration of that colour indicates what energy you need at that particular moment in order to improve and balance your emotional and physical state.