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Transmitted colour is light that passes through a translucent material which absorbs certain wavelengths, but allows others to pass through (a stained glass window).ģ. Direct colour comes from an incandescent source - one that generates and emits light itself (the sun, a torch, a firework display).Ģ. Each colour can be accurately defined by specifying its wavelength or frequency.Ĭoloured light or colour can come to us in three ways:ġ. The human eye can perceive light of wavelengths between 400 nanometers and 700 nanometers only. These cells transmit the signals triggered by light, via the optic nerve, to the visual centre at the back of the brain, to produce the phenomena of colours. Rods sense light to dark values, but do not distinguish colours cones come in three different types which are sensitive to either red, green or blue wavelengths. Lightwaves enter the eye and hit the retina, where they are absorbed by rod and cone cells. In Optics, published in 1704, he established the colours of this spectrum as red, orange, yellow, green, blue, indigo and violet (he liked seven because it matched the seven notes in the harmonic scale in music).Ĭolour is seen by the human eye because of the two light receptors - rods and cones - in the retina. Sir Isaac Newton demonstrated in 1666 that light is the source of colour when he held a glass prism up to a beam of sunlight, producing the rainbow hues of the visible spectrum. To begin to work with colour, it's helpful to understand how it works, from a scientific point of view. An artist may choose certain colours for their influence on perceptions of space, unity and emphasis, or out of a desire for realism or psychological suggestion. Colour is a language and it is important to foster a literacy and playfulness in its application and communication. Not only have we inherited cultural associations, but we also respond to colours in individual ways.
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Colour associations from our culture also influence them. Our responses to colour are not just biological. "Colour is the place where our brain and the universe meet"Ĭolour lies at the intersection of mind and matter, perception and the world.