Vertical tab description text not visible

TBH, I see not wrong with description here.
However, Vertical Tab BG color is too light for the theme.

I will let this open to review after merging all pending patches.

I saw the vertical tabs description text where it was noted that the issue had already been resolved. However, I noticed that the content in the body field was not visible, so I corrected it. Attached are the screenshots, and here is the merge request.
MR: https://git.drupalcode.org/project/darcula/-/merge_requests/17

Reviewed this and MR by @ tanushree-gupta → works as expected moving it to RTBC+