The idea is to give landowners a durable alternative to traditional “No Trespassing” signs, which can fall down, fade, or be removed. Purple markings can remain visible for much longer.
The exact rules vary by state, including where the paint must be placed, how large the markings should be, and how far apart they need to appear. That means the symbol does not have exactly the same legal meaning everywhere.
So if you see purple paint marking a property boundary, it is safest to treat it as a warning and stay off the land unless you have permission.
