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.
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?
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.