• 27 янв. 2011 г.
  • 254 Слова
Color is generally defined as the characteristic of any object that’s described in terms of hue, lightness, and saturation. In 1666 Sir Isaac Newton, (Mr.Gravity) through experiments with a prism, laid a scientific foundation for understanding color. Newton showed that a prism could break up white light into arange of colors, which he called the spectrum.
There are three attributes that sufficiently distinguish one color from all other perceived colors. First, the hueis that aspect of color usually associated with terms such as red, orange, yellow, and so on. Second, saturation (also known as chroma, or tone) refers torelative purity. When a pure, vivid, strong shade of blue is mixed with a variable amount of white, weaker or paler blues are produced, each having the same huebut a different saturation. Lastly, light of any given combination of hue and saturation can have a variable brightness or intensity, which is dependent on thelevel of energy present.
Chromatic, nonchromatic, and achromatic colors are visible to the human eye. Chromatic colors are the ones defined by Newton (, indigo, yellow). Examples of nonchromatic colors are brown, pink, and magenta. Achromatic colors are applied to black, grey, and white. Britannica Onlinestates that according to some reports, humans can distinguish some 10 million colors, all of which derive from two types of light mixture: additive andsubtractive. Additive mixture involves the addition of spectral components and subtractive mixture concerns the subtraction (or absorption) of parts of the spectrum.
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