Hidden handles noinset border question

I’m trying to theme fvwm something similar to OS/2 or Arca OS.

Like this]https://i.imgur.com/hD9hoWL.png[/img]

I’ve got the active window borders configured to how I want them to look. But am having difficulty configuring the inactive windows.

I would like the raised border on inactive windows to be the same as on active windows.

Here’s what I have:

I’ve tried working with various colorset entries, and configuring different types of borders. None seem to influence the appearance of the inactive raised borders.

I’ve adapted my design a bit. A bit of os2, fvwm, and some xclass toolkit.