...Some believe that writing on a yellow pad is easier to read than writing on a white pad. But Israel Abramov, a professor of psychology at Brooklyn College and a specialist in color vision, dismisses the theory. Readability, he says, is more a matter of contrast—how the color of the ink interacts with the color of the paper—than of the paper color alone. The highest contrast scenario is black ink on white paper, though Abramov concedes that in specific conditions, yellow paper might be preferable in terms of readability. "If the light is too intense, the paper can be glaring, and yellow cuts down the glare," he said.
Abramov prefers a psychological to a physiological explanation for yellow's predominance. "White paper that sits around starts to look yellow and old," he said. "I heard of one professor who used yellow paper for his lecture notes because he didn't want his students to know how old the notes were."
Legal pad enthusiasts do seem to have a psychological connection to their writing tablets. Philip Moustakis, a mid-level associate at the New York firm of Curtis, Mallet-Prevost, Colt & Mosle, uses one legal pad per case, and prefers yellow over white pads and a faint, as opposed to a dark, rule. "The darker lines intrude upon my thinking—they're yelling back at you," he explained. "You want a more subtle line."...