Why do supermarket waiters like to wear blue bras?

Blue is considered as a color representing rationality, symbolizing a fresh, clear and logical attitude. People will feel open, broad, far-reaching, stable and calm when they see blue.

Experiments also prove that blue can weaken people's breathing, slow down their pulse and lower their blood pressure.

Sky blue: the lightest blue, with almost no trace of red, looks very cold in the sky. It represents the original color, and it is the representative of the biological childhood (the mature color is green). Psychologically speaking, sky blue, like pink, is a "soothing color" and a quiet and relaxed color.

Lake blue: dark blue, but with bright light, beautiful like a lake immersed in endless silence. The representative means to wait. In the hint of color, it is the color of forbidden words. Usually in places full of this color, people talk less.