What color is a gas cylinder designated for flammable gases?

A gas cylinder designated for flammable gases is yellow. This color coding system is crucial for safety, as it allows personnel to quickly identify the type of gas contained within a cylinder. The yellow color specifically indicates that the contents pose a fire hazard and can easily ignite, which is critical information for anyone handling or working near these cylinders. Understanding color designations helps ensure proper storage, handling, and emergency response protocols are followed, significantly reducing the risk of accidents in environments where flammable gases are used.