Blue pills, contrary to what Breaking Bad may have you believe, act best as sedatives. Red and orange are stimulants. Cheery yellows make the most effective antidepressants, while green reduces anxiety and white soothes pain. Brighter colors and embossed brand names further strengthen these effects—a bright yellow pill with the name on its surface, for example, may have a stronger effect than a dull yellow pill without it.
Really appreciate that the author details how culture shapes our perceptions of color. This article is for people who aren’t yet convinced that the placebo effect is significant.