Why red is the color of danger?
Why red is the color of danger? Thanks to its long wavelength, red is one of the most visible colors in the color spectrum (second only to yellow). Its ability to instantly grab people's attention is the reason why it's often used to warn people of impending danger. Think: stop signs, sirens, fire engines, and red traffic lights.
What color calms stress?
Blue – A highly peaceful color, blue can be especially helpful for stress management because it can encourage a powerful sense of calm.