What is the recommended safety indicator color for warning against starting or moving equipment that is under repairs or shut down?

The recommended safety indicator color for warning against starting or moving equipment that is under repairs or shut down is blue. In many safety standards and practices, blue is traditionally used to convey a specific message regarding safety precautions or warnings related to maintenance or repairs. This color signifies that the equipment is not to be operated and alerts personnel to the potential hazards of working with machinery that is under repair or considered out of service.

Colors like red might indicate danger or stop, while yellow typically serves as a caution sign, warning about potential hazards or the presence of risks in an area. Green usually indicates safety or a go signal, which does not apply in this context as it conveys readiness rather than caution. Hence, blue is distinctly chosen for its direct association with the need for heightened awareness regarding non-operational equipment, making it the most appropriate color for this specific safety indicator scenario.