The 7 rainbow colors are associated to the chakras and the endocrine system.
Violet ~ Crown of the head, our pituitary gland is our connection with the universal energies.
Indigo ~ Middle of the forehead, our third eye, pineal glands represents forgiveness and compassion.
Blue ~ Throat, our thyroid gland is our physical and spiritual communication.
Green ~ Heart, our thymus gland is for love and sense of responsibility.
Yellow ~ Solar Plexus, our adrenal gland represents power and ego.
Orange ~ Lower abdomen, our pancreas gland is associated with emotion and sexuality.
Red ~ Base of the spine, our gonad glands, represents grounding and survival.