Indigo is a deep meditative color. It is the color of intuition and perception, and can used to help open the 3rd eye. Helping a person step outside their everyday perception for a new and unusual way to view a problem or situation is a key characteristic of indigo. Inventors utilize this indigo strength when an idea “comes out of the blue.”
Use indigo in rituals that require a deep meditative state, when introspection and deep personal reflection is desired. Indigo can help achieve deeper levels of consciousness, and greater attunement to your higher mind or inner self. It can also allow psychic abilities to be enhanced. If focus on personal issues, developing inner awareness and heightening intuition is your goal then indigo is a good choice. Symbolizing a mystical state of wisdom, self-mastery and spiritual realization, indigo increases deep personal insights, self understanding and inner communication. Be cautious of using indigo when in a depressed state, however, as it can deepen negative feelings: thus we will say of someone “they’ve got the blues.”
Service to humanity is one of the strengths of the color . Powerful and dignified, it conveys integrity and deep sincerity. Indigo conveys honesty, and is the color of order and structure, and reflects traditional ways of doing things. Interestingly, is is the color of policemen’s uniforms in many countries around the world: transcending politics or geography, the color is associated with law and order. With its deep color, it is the color of inertia, and brings both people and situations to a standstill.
At the other end of the personality scale, it can also indicate an overly emotional personality, someone who is moody and unpredictable, overly dramatic and prone to making a mountain out of a molehill.
Ravenhawks' Magazine Magick for Mind Body and Soul 