Is that not a problem? According to an earlier post (no pun intended!) the purple paint must be “placed so that the bottom of the mark is not less than 3 feet from the ground or more than 5 feet from the ground.“ so if it goes right down to the ground it's not compliant.
Probably not serious, but you wouldn't want an issue on a technicality.
tl;dr: Posts painted entirely purple are more than is required.
Texas Penal Code § 30.05. Criminal Trespass
Sec 2 (D) the placement of identifying purple paint marks on trees or posts on the property, provided that the marks are:
(i) vertical lines of not less than eight inches in length and not less than one inch in width;
(ii) placed so that the bottom of the mark is not less than three feet from the ground or more than five feet from the ground; and
(iii) placed at locations that are readily visible to any person approaching the property and no more than:
(a) 100 feet apart on forest land; or
(b) 1,000 feet apart on land other than forest land; or
(E) the visible presence on the property of a crop grown for human consumption that is under cultivation, in the process of being harvested, or marketable if harvested at the time of entry.