What color are state regulatory markers that indicate hazards such as swimming areas?

State regulatory markers that indicate hazards, such as swimming areas, are specifically colored orange. This choice aligns with the standard established by the U.S. Coast Guard and other regulatory bodies for navigational markers. The orange color serves as a clear visual signal to mariners and swimmers, alerting them to potential dangers in the water, including designated swimming areas, restricted zones, or areas where special regulations apply.

The use of orange for these types of markers enhances visibility and draws attention, ensuring that individuals can quickly recognize and respond to hazards. This color is universally associated with warning or caution, making it intuitive for those on the water. Other colors mentioned in the choices, such as red or green, serve different purposes in marker systems. Red typically denotes navigational boundaries or danger, while green is often used to signify safe passage or navigation channels. Blue markers are generally associated with informational alerts rather than regulatory warnings.