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The legibility effects of twenty-four combinations of text and background colors on the performance of a visual search task and an address input task on a visual display unit were studied. Eighteen females and eighteen males were each exposed to eight color combinations conditions in one session of approximately two hours duration. Subjects were allowed to adjust brightness-contrast settings to their preferred levels to give functional measurements of color combination effects. For the search task, the lowest error rate was for black text on a blue background (.0012 errors/character) which was 2.7 times lower than the higher error rates associated with color combinations of magenta on green, green on white, and white on black.
Bruce J. Pace (Mon,) studied this question.