The Crown Centre is located at the top of the head, above the ears. In tantra, this is variously called the Sahasrara (Thousand Petalled lotus), the Nirvana, the Parabrahma (Supreme Godhead) or the Bodhini (Awakened Consciousness) Chakra, among other terms; in Tibetan buddhism,it is termed the wheel of great bliss and associated with the Absolute Self-Nature. This is the centre through which one connects to spiritual dimensions and planes of consciousness beyond and above the seperate individual self. Through it one receives revelations from higher planes of existence. Such revelations are the basis of genius, higher intuition, and genuine religious experiences.
This chakra is usually described as being white (or shining white) ,violet in colour.   It may be that white corresponds to its higher or positive polarity, and violet to its lower polarity .
The element of crown chakra is "space".It governs the upper brain and right eye.

Ajna chakra

The word Ajna means "command", in the sense of the Guru`s command (spiritual guidance). The Tantric Ajna or Brow chakra has two petals, is associated with the tattwa of Manas or Mind (not to be confused with the Manas chakra, which is beyond even the most subtle elements .The color of Ajna chakra is indigo.The element of Ajna or the Third eye chakra is "space".It governs the lower brain,left eye,ears,nose and nervous system.

Vishuddha chakra

The Vishuddha chakra has sixteen smoke-coloured petals, each linked with one of the Sanskrit vowels. The central chakra-region is either white, transparent, smoke, or sky-blue in colour, and is associated with the element Space (Akasha), through which are transmitted the subtle vibrations of mantras [Laya Yoga].The element of vishuddha or the throat chakra is "space".It governs bronchial and vocal apparatus and lungs.

Anahata chakra

The Anahata ("Unstruck Note") chakra or the Heart chakra is said to have twelve petals. It is pink or green in color. . It is associated with the element or tattwa of Air, and is the seat of the Divine Soul or Higher Self, the Jivatman.It governs the heart ,blood,and circulatory system.

Manipur chakra

The Solar Plexus chakra is associated with color "yellow".The element or the Tattwa of this chakra is "Fire".It governs the stomach,liver,gallbladder and nervous system.It is the power house of our body.

Swadhisthana chakra

This chakra, called the Swadhisthana or "Self or Own Abode",also known as Hara or sacral chakra is figured as having six petals,orange in colour, and with a crescent in the center.The element or the tattwa of this chakra is  "water". This chakra therefore corresponds to the element Water and is traditionally associated with the sexual impulses and sexual energy. It would be suggested that it does not, however, correspond to the sex-organs as such, which are under the supervision of the Sacral and Pubic Centres, but to the original subtle energy behind the sexual impulse.

Spritual teachings place a lot of emphasise on celibacy, in order to raise and transmute this powerful sexual energy to the brain,  increasing higher consciousness. This is actually the basic principle behind celibacy in all religions. In practice however, this noble ideal flounders, because the individual is not yet ready to renounce physical sex, and may become psychologically unbalanced, full of guilt, or turn to paedophilia or other unnatural forms of sex .

Muladhara chakra

The Muladhara or the root chakra is one of the  seven Primary Chakras, and is associated with the element "Earth" representing the densest grade of manifestation. In the Kundalini-yoga system of Shaktism, the Muladhara Centre is described as having four petals, corresponding to the psychological states of greatest joy, natural pleasure, delight in controlling passions, and blissfulness in concentration. All these qualities correspond to the bliss of realising the Divine in the physical body. The highest and most complete forms of spirituality do not reject the body, but see it as the vehicle for the transmutation of the body and the spirit together.

It is, according to Shakta Tantric doctrine, the seat of Kundalini, the latent cosmic energy or shakti that resides in every living being. When this latent power is activated through Hatha Yoga practicises (pranayama, purification of the nadis, etc), it rises through each of the rear or spinal chakras, and up through the top of the head, to the Sahasrara ;Thousand Petalled Lotus; located above the crown. There it unites with its opposite polarity, Supreme Godhead Consciousness, and the yogi attains total Liberation from phenomenal reality.