THE SIXTH CHAKRA [AJNA]

LOCATION: Directly beneath the Crown Chakra
ELEMENT: Ether
COLOR: Indigo/bluish-violet
NUMBER OF PETALS: 2
PLANET: Moon
GENDER: Female
DAY: Monday
METAL: Silver
FUNCTION: Psychic vision
INNER STATE: Intuition, telepathic communications

The sixth chakra known as the Ajna in Sanskrit is located directly behind the third eye. The third eye is an extension of this chakra and rules the psychic sight. This chakra is the psychic seat of the soul. When the pineal gland within is activated, it will often light up brilliantly, flooding the head with white light, bringing an intense state of extreme bliss along with it. When the pineal is activated, it swells and there is a feeling of pressure about the size of a grape. The sixth chakra rules over the eyes, both the physical and astral vision, and the pineal gland. It is violet-blue/indigo in color, its element is the ether. Its metal is silver, and its and its planet is the Moon. This chakra is where the ida and pingala meet. It contains the all-important pineal gland and is the psychic seat of the soul. In some workings, energy is directed up the spine to the sixth chakra and projected out the third eye, as seen in many Egyptian hieroglyphs.

The sixth chakra actually rules over the Pituitary gland, the master gland, not the pineal which is governed by the seventh chakra. When the kundalini, or serpentine energy, ascends through sushmana, the main central nadi, and stimulates the pineal gland, this in turn stimulates the pituitary gland, which stimulates all other glands in the body.
when both the pineal and pituitary glands are in coordination a zone in your third ventricle becomes stimulated, giving you a profound subtle consciousness, which is experienced as a cosmo-coloric vision (or what people call the third eye opening)