On Gnome 3, the volume panel and the calendar panels are not like on the picture (opaque) but they are transparent All your versions, even the version "opaque" has a transparent volume panel, a transparent calendar panel, etc. Can you fix that so the panels be like on your pics, opaque? (well especially on the so-called opaque version).

7 7 good

Cinnamon theme is light and transparent even for dark theme and opaque theme. Same thing for Plank theme, light even for dark theme.

8 8 great