From your POV: anything made by yourself is blackhat.
From Google's POV:
Blackhat is anything obvious that it was built by yourself/ low quality/ spam. You've got the point.
If you build something which google can't tell that it's artificial, then it's at least gray hat.
If you create a high quality PBN without any obvious footprints, then that's white hat.
The color of the hat is just a guideline. Are you ranking in the first page and you stay below the radar? Then you shouldn't give a fuck.