Can we say when, where, and how the colours we see are formed? Are colours present like the flowers in a garden, or just an appearance? A simple, surprising fact, The Unified Principle of Colour, brings answers to age-old questions about colour and colour relationships. To the physics of light, and the biology of vision, a third discipline is added: the process of consciousness that enables perception. It shows that the observer, a living being, has an essential role in producing the colours we perceive.

Can we say when, where, and how the colours we see are formed? Are colours present like the flowers in a garden, or just an appearance? A simple, surprising fact, The Unified Principle of Colour, brings answers to age-old questions about colour and colour relationships. To the physics of light, and the biology of vision, a third discipline is added: the process of consciousness that enables perception. It shows that the observer, a living being, has an essential role in producing the colours we perceive.