Colours: Objects and Temperatures

The human eye and brain together translate light into colour.
Colour perception by humans is personal. It entirely depends on factors such as expectation, experience and the nature of the object being viewed. We are able to perceive these colour due to light emission. Where the wavelength emitted from the light source is reflected off an object into our eyes, in that way we're able to observe colour, as shown in the illustration. 
Red, green and blue are the additive primary colors of the color spectrum. The combination of these creates a pure white colour or with the balance of wavelengths, white light, but by varying the amount of any one of them, any colours in the visible spectrum can be produced.
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With this change in colour, the eye is forced to adapted quickly, this is done through colour consistancy, which is the eye's ability to adapt to the changes of the colour content of light. The eye is able to do this by bringing the colour of an object to a neutral point so that the object viewed remains nearly the same, this works as colour compensation created by the brain. 
When talking about colours and light, it's important to focus on colour temperature, where light is divided by colour "coolness" or "warmness", this is measured in degrees by kelvin (K). The warmer a light is, the lower its kelvin value is, while the cooler a light is the high its kelvin value is. For instance, a candle will have a kelvin value of about 1,000 K degrees, while an extremely blue clear sky will have a value of more than 24,000 K. 
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