This themes' colors are adjusted to the dark mode colors of Windows 11/Explorer.
Use included backdrops (hint: turn toolbar-borders and gloss & gradients off in prefs; pick missing colors from screenshot). The additional icon-set can be downloaded here: S-THEME Icon Set II
For titlebar color use #181818, inactive bar can be set with this reg-key:
S-Theme Windows-11-Dark.dlt (10.5 KB)