Aura

Aura is an invisible emanation or field of subtle matter viewed by the clairvoyant as a luminous radiation surrounding a living creature or object. It is generally said that the various traits of the personality are associated with different colors manifesting in the aura.

H. P. Blavatsky explained:

Here is an example of the relations of color to vibration well worthy of the attention of Occultists. Not only Adepts and advanced Chelas, but also the lower order of psychics, such as clairvoyants and psychometrists, can perceive a psychic Aura of various colors around every individual, corresponding to the temperament of the person within it. In other words the mysterious records within the Auric Egg are not the heirloom of trained Adepts alone, but sometimes also of natural psychics. Every human passion, every thought and quality, is indicated in the Aura by corresponding colors and shades of color, and certain of these are sensed and felt rather than perceived. The best of such psychics, as shown by Galton, can also perceive colors produced by the vibrations of musical instruments, every note suggesting a different color. As a string vibrates and gives forth an audible note, so the nerves of the human body vibrate and thrill in correspondence with various emotions under the general impulse of the circulating vitality of Prâna, thus producing undulations in the psychic Aura of the person which results in chromatic effects.

Further reading

• Aura at Theosopedia