install qt5ct and try adjusting things from there.
Many thanks, I will give that a try. No, I found nothing in LO's settings that made any difference at all.
It may very well be GTK poking through, since I did the base install with XFCE then added TDE. Next time I do a test VM, I'm going to try not installing a pre-packaged GUI at all, just the bare server, and see if TDE's dependencies pick up all that is needed out of the deep well that is Debian.
It's a shame, everything worked so well on Buster. The color difference was stark and immediately obvious.
Thanks again,
Curt-