Color is the tiny visible portion of the vast spectrum of electromagnetic energy which is one of the four fundamental forces of the universe. Light functions at the sub-atomic (quantum) level of matter as well as filling the whole of space (as microwave background radiation - an echo of the Big Bang of cosmic creation)

All life on Earth is dependent on the nutritious energy of light from the sun, which is conveniently stripped of dangerous levels of ultra violet radiation by the Earth's atmosphere.

Light, as bio-photons, is also working within the body's cells as communication, and outside the body to infuse the auric energy field. As the energy field extends outside the body, it can be sensed by the healer, and it is the goal of therapy to sensitively clear and re-balance the energies as a means of similarity affecting the mind and body of which it is the subtlest part.

The text above is credited to the "International Association of Colour" , Cambridge, England