Chakra 7 the Crown
The colour of the Chakra is white or some texts say violet. The Element is thought. Key words are cosmic consciousness here is where we merge with God.
Physical organ is the Pituitary gland. Some also say the Pineal.
If open you have good intuition, if underactive you are not good at thinking for yourself you may be rigid in your thinking relying on beliefs too much and may get easily confused, mental fog, chronic fatigue, Migranes. You may also display greed and materialism.
If this Chakra is over active you may live too much in a realm of fantasy or at the extreme suffer hallucinations. A sensitivity to light, neurological disorders and or endocrine. Boredom and frustration, a sense of elitism disturbed sleep, learning difficulties, mental health disorders.
Exercises to balance this Chakra would be the mountain posture, this posture works through the whole chakra system so is a great tune up. I would also do the Moving tree Vriksana because I feel this posture this posture aligns with the hands moving around and up through through the auric field up above the head in prayer posture this balances us all the way down to Grandmother Earth and Grandfather sky.