#8 The Purple Paint
In Texas, the purple paint is an official code to prohibit trespassing. You'll usually find them on fence posts, trees and rocks to serve as a visible reminder of where one property line starts and another stop. So if you see that purple sign, do not enter that territory.

#7 Marking Territories
The purple paint is official code in Texas which states that landowners must use this colour to mark the boundaries of the land they own.
The Texas Law is HB 793, under Texas Penal Code 30.05, Criminal Trespass, section 1, subsection D.

#6 The Instructions
This is the instruction to demarcate the area with the colour purple as set by the law.
The law requires the following regarding the use of purple paint:
Markings must be:
vertical
at least 8 inches long
at least 1 inch wide
bottom of the mark should be between 3-5 feet above the ground.
Markings can be no more than 100 feet apart in timberland
Markings can be no more than 1,000 feet apart on open land,
They must be in a place visible by those approaching the property.

#5 No Signs
There is no sign along with the paint. But there are instructions about the height and the width of the paint to make it equivalent to the no trespassing sign!

#4 Why Purple?
That's because purple blends with the natural tone of forest and is also visible to people who are colour blind!

#3 Countries Who Follow This Law
Arkansas and Texas and have similar property marking colour laws on the books. Illinois, Missouri, North Carolina, Maine, Florida, and Kansas also use purple paint to mark territory. Idaho, Montana, and Arizona use orange paint to mark the boundaries.

#2 The Law
Reaching as far back as 1989 in Arkansas, the “Purple Paint Law†lets landowners use the colour to mark the boundaries of their land, and is equivalent to a “no trespassing†sign in the eyes of the law.

#1 Keep A Check
So, next time when you’re hunting, fishing, or hiking, just be vigilant enough to see these brightly-colored markings, or you may find yourself up against an angry land owner or even slapped with a first-degree trespassing charge.