some experts are so convinced that colors have a storng effect on us that they belive colors can be used to heal. they say that by concentrating our thoughts on certain color, we can cause energy to go to the parts of the body that need treatment. White light is said to be cleansing, and it can balance the body's entire system. Yellow stimulates the mind and creates a positive attitude, so it can help against depression. Green, which has a calming and restful effect, is supposed to be good for heat conditions. Book are now available that teach people how to heal with color .these book provide long lists of ailments and the colors that can heal them.