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Also, in every color combination surveyed, the darker text on a lighter background was rated more readable than its inverse (e.g. blue text on white background ranked higher then white text on blue background).
I wish Columbia Blue and Red were tested in the survey. They were my high school’s colors; and they were terrible. The worst permutation was blue text on a red background.
Question for all you who prefer light source-code on a dark background: why do you like it?