While attending college at St Lucaspavilioen in Antwerp, author Gerald-Johan Vanoise sensed something was missing in the common colour theories; they didn't match the reality of the two to three colour wheels currently being used. Knowing realities use colours differently from that demanded by the theory, he resolved to integrate those realities instead of ignoring them. Vanoise developed the Seven Colour Wheel Theory. In Seven Colour Wheels, he delves into this theory, revealing the starting point of the yin and yang of colours. He demonstrates how the principles of traditional colour theory with the colour wheels of subtraction and addition belong to a larger system of interactive colour attractions and saturations that can be derived from at least seven different regions that follow their own practice of reality of seeking balance. He validates his theory with the colour usage in drawings based on C.G. Jung's thoughts in Man and His Symbols. Vanoise also describes the psychological associations, the spiritual attraction toward colours found in The Tibetan Book of the Dead. In addition, he shows how the seven colour wheels also mesh with the Zang Fu organ colour associations and how they fit well with the spine sections. And in the book's last chapter, the Author discusses the match between the Yin and Yang psychology of colours and the significant usage of letters in the context of the changes of seasons.