" The same researchers also wanted to know why red hampers academic performance. It turns out that the color red activates the right hemisphere of the frontal cortex, a pattern of brain activity that typically indicates avoidance motivation. Avoidance motivation is the technical term for a state in which you’re more concerned with avoiding failure than you are with achieving success. It’s a distracting state of mind that all but guarantees poorer performance when you’re trying to solve questions that require insight and mental effort. Psychologists have also shown that people literally recoil from the color red, leaning slightly farther backward in their seats when they’re about to begin a test with a red rather than green cover. None of these effects occurs consciously, but when they occur together it becomes clear why the color red can be so damaging in academic contexts. "

― Adam Alter , Drunk Tank Pink: And Other Unexpected Forces that Shape How We Think, Feel, and Behave