The colour

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A brief presentation of how colour works and the types of colour there are, for Arts & Crafts 3rd grade students.
Based on Lucía Alvarez's presentation: "El color. Características generales" http://www.slideshare.net/luciaag/el-color-caracteristicas-generales

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The colour

  1. 1. The Colour General characteristicsArts & Crafts 3rd grade (ESO) Oskia Alvarez @oskiaisuri
  2. 2. There are 2 types of colour:-Colour lights: they arethe real colours, the onesin light.-Colour pigments: theyare the ones we use topaint.
  3. 3. How Colour WorksIt is light that contains all the colours we see, not the object.
  4. 4. How Colour WorksIt is light that contains all the colours we see, not the object.When something is hit by light, some of it is reflected andsome is absorbed.The colours which are reflected are the ones we see.Objects which reflect no light appear black.
  5. 5. The SpectrumWe can see all the colours in light by shining it through aprism.These colours are called the “spectrum”.
  6. 6. This is what happens when we see a rainbow.Only the light shines through drops of water.
  7. 7. The “Spectrum”White light is the sume of all coloured lights.The “Spectrum” can be reconstructed in a laboratory with thehelp of a cristal prisma and a torch.This experiment was done for the first time by Isaac Newtonin 1666.
  8. 8. Coloured light and additive mixtures-The coloured light is producedby light rays.-The primary colours of light are:red, green and purple-blue.-The mixture of these three lightsin equal quantity gives whitelight. This is why it is calledadditive mixture, because it goesadding light.-The secondary colours of lightare: cyan, magenta and yellow.
  9. 9. Colour pigments and subtractive mixtures-The paints we use to put colour onpaper, etc. are colour pigments. Theyare colour powders mixed withagglutinants.-There are three pigments that wecannot get through mixtures, theprimary colour pigments: magenta,yellow and cyan.-The mixture of two primaries, gives asecondary colour pigment: purple-blue, red and green.-This is called subtractive becauselight is rested from the resultingcolour.
  10. 10. Complementary colour pigments-Complementary colours arepairs of opposite hues that whenmixed together give black.-Each primary colour has itscomplementary second colourthat is the one that does notcontain the primary colour on itsmixture:Cyan + Red = BlackYellow + Purple-Blue = BlackMagenta + Green = Black
  11. 11. Attributes of colour -HUE: is the name of each colour. There are less familiar colours that we define them by the hue in its mixture: redish yellow, blueish green, etc. -VALUE: it specifies the degree of a hue’s lightness. More value = lighter Less value = darker The pure value of a hue is when it does not contain in it any black or white pigment. -SATURATION: is the degree of a colour’s purity. It refers to the amount of colours and greys that form it. The primary and secondary colours are the most saturated hues.
  12. 12. Scales of colour-Scale of cold hues:is the one where theblue hue is present(blue families).-Scale of warm hues:is the one where redis present (redfamilies).-Scale of neutralhues: these are themagentas and geensin their variousvalues andsaturations.
  13. 13. Chromatic harmony-It is an equilibratedrelationship betweentwo or more colours.-A chromatic harmonyoccures when we usecolours for acomposition that areclose to eachother onthe colour wheel.-For example a blueand green harmony.
  14. 14. Chromatic contrast-It is an optic effectthat occures when wesee at the same timetwo very differentcolours, for exampletwo complementarycolours.-Another type ofcontrast is the onethat occures betweenlight and dark hues.
  15. 15. This presentation is based on:- Lucía Alvarez, “El color. Características generales” a Slideshare presentation.- “Explore colour” an activity in www.artisancam.org.uk website.

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