The Sahasrara, also known as the Crown Chakra, is located at the top of the head and is associated with the colors White and Violet. The Crown Chakra is connected to the pineal-cerebral cortex, the central nervous system, and the right eye. It's function is our connection to the universe, and for some, it is a gateway for energy and knowledge.
The Third Eye Chakra (Ajna) is located in the center of the forehead just above the eyebrows and is associated with the color Indigo, or Light Purple. This Chakra point has physical connections with one's eyes, ears, nose, lower brain, upper neck, and the pituitary gland. It is also connected to, and responsible (on the emotional side) for one's intuition, truthfulness, dream states, inspiration, and perceptiveness. On the mental end of the spectrum, our wisdom, insight, intellect (not to be confused with intelligence), and powers of the mind are all controlled here.