Good Designs Have Strong Contrast
http://www.idratherbewriting.com/2009/01/03/contrast-is-prominent-in-good-design/

Johnson, Tom H.
I'd Rather Be Writing
2009

Abstract:

Push contrast more than you might be naturally inclined. If you don’t, you end up with conflict. The next time you eat at a restaurant, look closely at the menu. A good menu has a high degree of contrast between sections.