COLOR ILLUSIONS

MANY PHARMACEUTICAL MANUFACTURERS USE A SINGLE COLOR ON THEIR LABELS IN AN ATTEMPT TO DIFFERENTIATE THEIR PRODUCTS. BUT OUR PERCEPTION OF COLOR IS CHANGED BY LIGHTING AND OTHER FACTORS. TWO COLOR PATCHES THAT ARE EXACTLY
THE SAME SHADE MAY BE PERCEIVED AS DIFFERENT COLORS IF ONE OF THEM IS SEEN AS BEING ILLUMINATED DIFFERENTLY THAN THE OTHER.*

* Foster DH. Color constancy. Vis Res. 2011;51:674-600.

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