How much of their own past experience colours their perceptions and prevents them from seeking better solutions. (slaw.ca)
On Tate's website you can now read a beautiful article by Louise Cohen, journalist for the Times and editor for Tate, illustrating the history of colour perception theories as well as depicting how great artists such as Turner, Matisse, Mondrian and Malevich applied them in their work. (inexhibit.com)
The reference to background was, of course, a feature of Gestalt psychology; the importance of contrast is brought out by Jonathan Westphal, drawing on recent work on colour perception. (religion-online.org)