Color therapy and other therapies
In acupuncture a point is punctured to balance the yin and yang energies, which can be done with blue color and red color in color therapy. All other therapies tend to either tone or sedate a particular point, whereas same results, if not better, can be achieved with proper use of colors.
Astrology completely relies on color. A ruby or red color gem is used to infuse red energy from sunlight. Whereas Saphire or blue gem is there to infuse cold energy in the body. While black haqiq has mysterious powers and generally used to cleanse the environment around you.
In yoga too color are working. Yoga has chakra system, and each chakra is associated with a color. For example, take root chakra the center of all carnal needs is associated with red color. Color therapy also associted red color with passion, enthusiasm, warmth, vigor etc.