“TCI 12 Tone method tools, products and training have a proven, logical, scientific, and indisputable colour accuracy, theory, education and experience behind them. Correct interpretation of colour theory, the Munsell colour system, and the science behind human vision and the brains interpretation of colour harmony has resulted in the entire realm of colous has been divided into 12 distinguishable tones. Just as music has 12 distinguishable tones, so does colour. ¾ of the population require ‘neutral’ (warm/cool) mixtures of colours. If a system does not have any, or a majority of these ‘neutral’ categories, then it does not provide the accuracy needed.