Tuesday, November 20, 2012

COLOUR WHEEL


Sir Isaac Newton developed the first circular diagram of colours in 1666. Since then scientists
and artists have studied and designed numerous variations of this concept.


Primary cololurs: 
in traditional colour theory, Red, Yellow and Blue are the three pigment colours that cannot be mixed or formed by the combination of other colours. All other colours are derived from these hues.

Secondary colours:  
Green, Orange and purple are colours obtained by mixing the primary colours. Orange is obtained by mixing red and yellow, green from yellow and blue, and purple from blue and red. 
  
Tertiary colours: 
Yellow-orange, red-orange, red-purple, blue-purple, blue-green and yellow-green are colours obtained by mixing the secondary colours.

Warm and cool colours: 
Warm hues and high intensities are visually active and stimulating, while cool hues and low intensities are more subdued and relaxing. Light values tend to be cheerful; middle values undemanding and dark values somber. Light, warm colours, tend to expand and increase the apparent size of an object, whereas deep, cool colours appear to contract. Incandescent bulb cast a warm glow, while many fluorescent cast a cool light. Daylight too, can be warm or cool; depending on the time of day and the direction from which it comes.
Warm light tends to accentuate warm colours and neutralize cool hues, while cool light intensifies cool colours and weakens warm hues.  

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