1. Colours are divided into achromatic and chromatic

2. The achromatic colours are white and black, and the various shades of grey between them. All the colours that are not achromatic are classified as chromatic colours

3. HUE, VALUE and INTENSITY The three qualities of colours

4. HUE Apples are red, lemons are yellow, and the sky is blue. Hue is the term used to describe the different colour pigments, such as red, yellow, reddish yellow (orange).

5. Some colours appear lighter and others darker. LIGHTNESS Value is the term used to specify the degree of the lightness of a colour (hue). VALUE

6. Some colours appear brighter and others duller. INTENSITY Saturation is the term used to specify the degree of the pureness of a colour. SATURATION

7. Colour families Yellows Oranges Reds Colours with similar hues belong to the same colour family

8. Munsell: Model for nuances classification

9. It is used to establish the nuances between colours. Value is placed On the vertical axis, from black to white. Around the axis lie the different hues of the chromatic circle and the variations of saturation. SO, According to the nuances of these basic hues, saturated colours move closer or further away from the axis losing saturation, and move up and down between white and black changing their value.

10. Is Colour our Friend or Foe? Colours can be a great friend within, but they can also be a very powerful and strange enemy. Strange…? Look at the pictures below, how many colors you see?

12. Some curious things happen when the brain becomes confused by the information it receives from the eyes. Compare the colours in the two small circles. Are they the same or different?

14. Afterimages and successive contrast. Stare fixedly at the centre of circle A for at least 20 seconds, then immediately look at the centre of circle B for about ten seconds, noting the changing afterimage.

16. Each sector will display an afterimage the colour of the additive complement of the stimulus colour. Repeat the procedure, this time looking immediately at the centre of circle C.

18. Now the colours of the afterimage in each sector will influence the appearance of the red colour in an example of successive contrast.

19. Relax !!!