Unofficial vs. Official detail pages

[Orion Pobursky]

We have detail pages for both official parts and unoffical parts, but they look similar (this is on purpose). It has been suggested that we differentiate them in some way, perhaps by some sort of color coding. I'm open to suggestions on ways to accomplish this.

Example:
Official Part
https://www.ldraw.org/parts/official-par...id=4162p1c

Unofficial Part
https://www.ldraw.org/cgi-bin/ptdetail.c...162p1d.dat