Once I had a cache nearby called "Number 9". I had to archieve it because the placement was compromised by the removal of trees.
This cache is called "Number 8" and you'll see why when you get to GZ. Place your feet in the 3 sided "box" at number 8 and look up. Doesn't get any easier than that! Oh, except you'll need a TOTT.
The word "purple" has nothing to do with the cache. Just helping out with name challenges.
Good luck!