A lot of scientific study of the physical auras has been done by the Western countries in recent years and there is much about photographing the auras, and they have variously called it the human atmosphere force field, bio-energy and so on. The fundamental substance of which the aura is composed of is best described by the Sanskrit term, prana.
Prana is a deep subject; but let us for our present purposes understand it as the vital essence or force, which is the basis of all life. It is the steam that runs the physical and mental machinery of life. The colours of our mental states are manifested in the pranic substance of our auras just as the colours of chemicals are seen in water.
Logically, we can say that these colours are regulated at seven energy centres of the body called the chakras. Each of the chakras, mooladhar, swadhishthan, manipoorak, anahat, vishuddhi, ajna, and sahastrar vibrate at a particular colour frequency. Any imbalance that stays for too long becomes chronic and manifests as an ailment in the physical body. What the clairvoyant can see are the aura or chakra imbalances which are seen as the shade of the colour being too dark or heavy or colours other than the chakras own colour manifesting. Considerations like what shade is mixing with the natural colour, in what proportion, the positioning, the luminosity, etc. all determine the state of the being.
The writer is the Founder, Dhyan Foundation