VirtualBox does not respect dark themes

[OxOOCOFFEE]

I just installed fresh Linux Mint Cinnamon 19.1 with Virtual Box 6. After starting vbox I noticed all text in vbox and help is gray on white background witch is very hard to read for me. I am attaching my screen shots

[OxOOCOFFEE]

VirtualBox 6 test on Cinnamon 19.1

[OxOOCOFFEE]

Cinnamon 19.1 Theme

[digifuzzy]

Main Window with mouse over settings toolbar button

[digifuzzy]

Settings Dialog display

[digifuzzy]

As suggested from forum  post, adding more details and screenshots regarding this problem.

System: Artix Linux (Arch derivative).
Desktop: XFCE
Qt version: 5.12.0
VBox: 6.0.0r127442

qt5ct and qt5-styleplugins installed correctly. Variable QT_QPA_PLATFORMTHEME has been set. VLC and other qt5-based applications display normally with theme settings.

Screenshots added:

1) VBox6_Main_MouseOver - shows main virtualbox window with the mouse positioned over the settings toolbar button.
2) VBox6_Settings - shows the settings dialog presented

[janitor]

Summary changed at socratis behest.

[socratis]

Thank you janitor! ;)

Idea from #18301 a duplicate of this one...

[Ore]

Screenshot of the main UI with Gnome Dark Mode.

[Ore]

This also impacts Gnome's dark mode. Generally dark mode is much easier on the eyes but with virtualbox it makes the UI all but unusable!