Why are most medical masks blue?

Over the past year, masks have become a necessity for us to go out of COVID-19. We can see the masks we wear in the street, mostly blue, and some pink, white, black masks, red masks on Spring Festival Gala, etc., but why are medical masks all blue?

In fact, the Medical Mask in the early years was still white, but later we gradually found that the deployment of white coat and white mask of medical staff will produce reflection under the light, which leads to the visual fatigue of medical staff and patients. Changing the mask to a blue color with a cold tone can reduce the reflection, and make the color no longer monotonous, and it is not easy to make people feel fickle, and also help the patient to ease their mood. Moreover, the medical staff may be exposed to blood and secretion in the face of various patients, while the blue mask will not appear particularly dazzling after being stained with blood and secretion, which can effectively slow down the serious atmosphere in medical treatment.

surgical mask
Maybe someone else will ask: why is the surgical suit blue or green? Although most people may not have seen or performed surgery, watching TV shows will know that the surgical clothes of medical staff are blue or green, and they usually wear white coats.
This is because white is very easy to be dirty, so medical staff should often clean and disinfect white coat to look clean and tidy. But for the surgical staff, they often deal with the red, piercing blood pollution. When these splashes on the white coat, they will immediately constitute a fierce visual impact, adding serious mind. Moreover, if you look at a color for a long time, people will present "supplementary color residual image", that is, after medical staff see red color for a long time, when they shift their eyes, they will see complementary colors of red color and see green elsewhere. So, the medical staff changed the surgical clothes into blue or green, which can relieve the visual distress, reduce the tired feeling of the eyes to the red color, and help keep the brain sensitive to the red color.
So, doctors wear blue or green surgical clothes, wear blue masks, is a scientific basis Oh!