Chromotherapy

Chromotherapy is the believed use of colored lights in order to balance"energy" lacking from a person's body, whether it be on physical, emotional, spiritual, or mental level. This is distinctly different from proven forms of ultralight therapy such as photobiology.
This idea comes from Avicenna  (August c. 980 – June 1037), a Persian philosopher who believed that color was an observable symptom of disease. He even created a chart that links color to the temperature and physical condition of the body.
Therapists who work in healing with color therapy use tools like gemstones, candles and crystal wands all of different colors to apply light and color to the body in order to balance energy.
To no ones surprise this has no scientifically proven data. Color is simply a visible form of electromagnetic energy, and has no apparent affect on the physical body whatsoever.


http://healing.about.com/cs/colortherapy/a/aa_colortherapy.htm

http://www.energyandvibration.com/color.htm