Colour booklet

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colourProperties of coloursThere are differences between colours. Colour names such as yellow, orange, red and violet indicate thefirst clear differences. In addition we distinguish dark and light colours, bright and soft colours and alsowarm and cool colours. In the existing literature different words are used for these properties or the sameword is used for different properties. In this booklet we use the following terms to designate properties ofcolours: colour temperature, colour hue, brightness and saturation.Colour temperatureWe intuitively estimate the temperature in a yellow space as higher than that of a blueone. We call yellow a warm colour and blue a cool one. We see how relative this iswhen we mix yellow with blue. We then get green, i.e. colour made up of a warm and acool colour. Compared to blue green is a warm colour, compared to yellow a coolcolour (ill. 10).Red is also felt to be a warm colour. If we mix blueand red, the mixture is violet. Compared to blue,violet is experienced as warm, compared to red it'scool.pagen 9
colour[ 11]It can be even more subtle. Let us place two yellowsnext to each other. One of the yellows hastraces of blue in it and the other traces of red. Weexperience one of the yellows as warmer comparedwith the other. Although yellow is a warm colour parexcellence (ill. 11).We cannot simply separate the whole spectrum into warm and cool colours. We can,however, state that blue is at the center of a cool area and orange yellow the center of awarm area.Colour hueThe proportion in which the colours of the spectrum are reflected determines the colour hue.In the section on The Origin of Colour we saw that no colour is completely pure:every colour contains traces of the other colours in the spectrum.The largest reflected portion of the spectrum determines the principal colour, for example red.The second largest reflected portion, for example yellow, affects the principal colour.Together they determine the colour hue. In thiscase we speak of a red with traces of yellow. Ared with blue traces and a red with yellow tracesare both red, but each have their own colourhue. The further apart the trace colours are, thegreater the difference in colour hue (ill. 12).[ 12]pagen 10
Page 1 and 2: colourA guide to colour and colour
Page 3 and 4: colourIntroductionThe world around
Page 5: colour[2]These substances have the
Page 8 and 9: colourLightfastnessLightfastness va
Page 12 and 13: BrightnesscolourThe brightness of a
Page 14 and 15: colourMixing coloursWe can mix colo
Page 16 and 17: colour[ 17 ]If we mix the colours n
Page 18 and 19: colourPrimary colours with white an
Page 20 and 21: colourThe violets mixed from cyan b
Page 22 and 23: Optical mixing of colourscolourOpti
Page 24 and 25: colourGlazing mixingIn painting gla
Page 26 and 27: colour12If we next look at the colo
Page 28 and 29: Saturation and suggesting spacecolo
Page 30 and 31: colourIll. 43The saturation of the
Page 32 and 33: colourand saturated. The further to
Page 34 and 35: colourIll. 49The red ground has bee
Page 36 and 37: colourProduct Primary colours Addit
Page 38: P.O. Box 4, 7300 AA Apeldoorn, NLPr

Colour booklet

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