First of all the Indigo thing is about LIFE color not just aura color, since the aura changes. To understand the indigo story, start at the beginning, with the Life Color work of Nancy Ann Tappe:
(or at least near the beginning)
What is the Life Color?
Nancy Ann Tappe, a pioneer in the study of “life colours,” is known for her groundbreaking 1986 publication, Understanding Your Life Through Colour. Tappe’s book is thought to be the first source to discuss indigo, the newest aura color.
In Understanding Your Life Through Colour, Tappe describes the life color as, “the single color of the aura that remains constant in most people from the cradle to the grave.... The life color establishes a focus for the entire lifetime, similar to having a major in college” (Tappe, 1986).
And the author wants to grant permission to republish the whole article, '
so read it here, it's a pretty concise summary of the beginning ...
http://naturalmedicine.suite101.com/..._my_aura_color
So some are tan, or red or orange or any color of the rainbow. Its not about being special - it is just a tool to help you along your way in this lifetime. And right now, I can't seem to find the test to take to see which is your main life color. It's just a tool like a screwdriver works better than a table knife for putting a shelf together.
Also, somewhere there used to be the interview with Nancy Ann that was in the first book devoted to the topic, The Indigo Children: the new kids have arrived by Lee Carroll and Jan Tober.
Karen Eck, contributor to The Indigo Children - section: A Nutritional Answer