If it is a qualified white mask sold by regular manufacturers is not harmful, if it is not qualified masks, no matter what color may be harmful to people’s health. Whether the mask is harmful and the color is not related, most of the clinical masks for the blue, aqua blue, some hospitals will customize the hospital-specific logo, color or pattern, as long as it is qualified is not harmful. It is recommended to buy medical surgical masks with production license and product registration number. Ordinary people can choose YY0469-2011 standard medical ordinary masks, or KN95 or N90 masks that meet the GB2626-2006 standard, and people with the risk of viral exposure can choose GB19083-2010 standard medical protective masks. It is recommended that patients go to regular channels to buy qualified masks, no matter what color will not endanger the patient’s health.