What color must biohazard labels be?

Biohazard labels must be fluorescent orange/red to ensure they are easily recognizable and convey the presence of a biological hazard. This specific color choice is mandated by health and safety regulations to provide clear and immediate visual identification, which is crucial for safety in environments where biological materials are present. The use of a bright, attention-grabbing color helps to alert individuals about potential dangers associated with biological substances, reducing the risk of exposure or contamination.

Colors such as bright blue, black, or white do not have the same level of visibility or association with biohazard warnings, making them unsuitable for this purpose. The fluorescent orange/red color effectively communicates the level of caution needed when handling potentially hazardous materials, aligning with the universal standards for safety labeling in biological contexts.