Joseph Albers

 Josef Albers is an American painter, who related with Bauhaus. His legacy as a teacher of artists because of his extensive theoretical works proposing that colour other than form which is the primary medium of visual language. He was born in 19 March 1888 and he died in 25 March 1976.
Josef Albers believe that a colour a colour has many faces, and one colour can be made to appear as two different colours. In order to prepare for the second part of the demonstration, Albers suggested to cut out in red and white colour paper into 2 equal circles and dot the center point with black. By looking at the red circle for few minutes and then shift the focus suddenly to the white circle. It is called "Afterimage Effect".
  Moreover, Josef Albers often used shapes instead of realistic images to display his colour as he wanted the colour interaction to be the main focus so he used simple shapes. He did a series of paintings which named “Homage to the Square”, he only used squares but not other shapes. It is because he believed that squares are true and still, also is manmade shape which makes him feel more interest to use.
  He suggested that mountains in a film look blue from far away. Also, looking the pool close, it is visible and clear, however, when looking deeper or farther into the pool, things become darker and the water looks thicker. It appears that it is getting thicker at a constant rate but it isn't.
  Josef Albers also explained the fluting effect, it can be further extended if we make from dark(from left) to light(from right), it results extremely contrast.