Light Interface Colors Changed from High Sierra to Mojave

Some of the components (mostly headers) do not look the same on Mojave as they used to look like in High Sierra.

Some examples:

Filter Bar on Commits History View - High Sierra (it has light grey background)

Filter Bar on Commits History View - Mojave (it has white background)

Changed File Info - High Sierra (headers have light grey backgrounds)

Changed File Info - Mojave (headers have white backgrounds)

Bookmarks window - High Sierra (sub header has light grey background)
 

Bookmarks window - Mojave (sub header has white background)
 

Brian Ganninger confirmed in the forum thread I opened to confirm this thing that this is an know issue related to how Mojave treats UI elements, so im adding this as a bug/improvement because the missing color information on the interface makes the UI less readable/intuitive/usable.