Joseph Albers

 The greater difference between colours- in hue, saturation or value, the greater the apparent spacial distance between them, especially if the edges between them are hard rather than soft. An optical glow caused by the eyes reaction to the contrast in hues begins to surround one of the colours.  Joseph Albers devised a single framework for working with these interactions. He named it Homage to the square. It opened up many possibilities to experiment with the effects of precise colour combinations. These experiments occupied Albers for almost 30 years. He found in the case of a true middle mixture in hue and value, the parent colours would seem to leap across to reappear along the far edges of the middle colour. Albers stated:
In my work 
I am content to compete
with myself 
and to search with simple palette 
and with simple colour
for manifold instrumentation
so I dare further variants