Powers of the mind are indicated by Indigo in the 'Colour' philosophy of magic.
Publisher's blurb: "Indigo is the colour of the mind. It is a deeper shade of Blue; where blue looks externally in the universe for ways to make order and gain control, Indigo looks within, seeking first and foremost order and control of the mind.
"Those with mastery over Indigo magic can control others with a thought, bring oblivion upon their enemies and read into the deepest memories of their friends and enemies alike.
"The most powerful and feared of mind mages is the Skeptomancer, a mage with such mental power that they cease to require the normal accoutrements of magic, becoming able to manipulate the thoughts and minds of others by the sheer force of their will alone."
More when I get hold of a copy!
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Book Details:
Author: Evangelos Hugo Paliatseas
Publishers' Reference: PDSSCA35
ISBN: n/a
PDF, 21 pages
Date: March 2005
Product page last updated: 5 April 2005