If you’re out hiking or walking in the countryside, you might see all kinds of fences—chain link, picket, or three-board. But if you come across a fence with purple-painted posts, turn back. That purple paint isn’t for decoration—it means No Trespassing. In 16 states, “Purple Paint Laws” make painted posts legally equivalent to no trespassing signs. This method is more durable, especially in rural areas, and also serves as a warning to hunters: No hunting allowed. With over 1,000 hunting-related injuries and deaths annually, landowners use purple posts to help keep their land, families, and animals safe. The specific color is even called “No Hunting Purple