The 7 rainbow colors are associated to the chakras and the endocrine system. Violet, crown of the head, pituitary gland is our connection universal energies. Indigo, middle of forehead, pineal gland represents forgiveness & compassion. Blue, throat & thyroid gland, is our physical & spiritual communication. Green, heart & thymus gland, is for love & sense of responsibility. Yellow, solar plexus & adrenal gland, represents power & ego. Orange, lower abdomen & pancreas gland, is associated with emotion & sexuality. Red, base of spine & gonad glands, represent grounding & survival.