Every colour has a wavelength and vibrationary rate that is unique to it. When light rays enter the eye through the pupil, they travel to the retina. The retina consists of a layer of cells situated at the back of the eye. The cells in the retina contain light-sensitive pigments; each cell is sensitive to one of the three primary colours. When light reaches the retina, the pigment in these colour sensory cells is broken down. This has the effect of triggering a nervous impulse that travels through the optic nerve to the visual cortex in the brain. Nervous impulses travel, via the hypothalamus, to the pituitary and pineal glands. These glands are sensitive to the effect of light, and control many of our body functions, and our energy system.

Our energy system contains 7 chakras, or centres. Each chakra affects specific organs and glands, and is responsive to a specific colour. For example, the pancreas is linked to the colour yellow, and affects the working of the liver and gall - bladder, and the nervous system

To ensure a healthy, balanced body we need to receive a healthy balance of colour. If we lack a colour, or receive too much stimulation from a colour, this will unbalance the effective working of our body.