What color is an all-round light on a boat?

An all-round light on a boat is white. This light is used to indicate the presence of a vessel from any direction, providing visibility to other boats, especially during nighttime or in low visibility conditions. The positioning of the all-round light is typically at the highest point of the vessel, allowing it to be seen from all angles.

In navigation, the color white is universally recognized for lights that illuminate the entire area around a vessel, distinguishing them from other colored lights that may have specific meanings, such as red for port (left) and green for starboard (right). The all-round light is particularly important for indicating that a vessel is at anchor or engaged in fishing, thereby enhancing safety on the water.