Dark themes in markdown viewers

[AndreasMatthias]

Feature request:

When using a dark theme (dark background) in your markdown viewer you can hardly see the stroke color.
It would be great to have:

• An option stoke color to specify the stroke color.
• An option background color to specify the color of a non-transparent background.

[charlie430]

Adding the option to support github light/dark themed images would be helpful.
https://github.blog/changelog/2021-11-24-specify-theme-context-for-images-in-markdown/

[daveloyall]

+1. I think this is the same issue that I came here to report: the diagram screenshots are illegible when the user casually scrolls down https://github.com/GuntherRademacher/rr/ using Firefox NIghtly 122.0a1 (2023-12-08) (64-bit) on Windows and the user has configured Github to use the "dark theme".