What color is used to depict obstacles in military symbols?

In military symbols, obstacles are typically depicted using green or black colors. The use of these colors helps to visually communicate different types of terrain features or obstacles that could affect movement and operations. Green symbolizes natural obstacles, such as dense vegetation or water barriers, while black is used for man-made obstacles, which may include fortifications or urban structures. This dual-color coding enhances situational awareness and aids in operational planning by ensuring that soldiers can quickly identify hazards on a map. Understanding these color codes is essential for effective navigation and tactical decision-making in the field.