So it was that Eastlake replaced an earlier grayish-green hue with red, based on the latest research into sensory physiology. “The interaction with the golden frames and the mainly cooler colours of the paintings themselves led, according to this research, to a harmonious effect in the beholder’s visual experience,” Klonk claimed.

Cognitive psychology is one of those fields of discussion which was, at least historically, of great importance for the exhibition of art. The first director of the National Gallery in London, Charles Eastlake, preferred hanging paintings against a background of red material, something he introduced in the middle of the nineteenth century