Violet is considered to be the most spiritual color of the rainbow.  It is associated with an energy center (chakra) in the head. 
Violet has a purifying and antiseptic effect and can help with sunburn and similar conditions.  It also helps reduce the appetite.  For mental conditions, violet helps reduce fear and anger.  It can reduce shock and emotional problems.  It stimulates creativity, especially if you wear or carry violet stones, gems or crystals.  Violet is also associated with royalty and mysticism.  Priests and ministers of various denominations often wear purple or violet on especially holy days in their religious calendar.
    Since violet is associated with the head, it will aid health problems in that area such as sinus infections, hearing problems or brain problems.  
    People who are overly materialistic can use blue, indigo and violet clothes and crystals to aid in developing their spiritual side.  Those who become too spiritual and lack roots in the material world, will be aided by red, orange or yellow instead.