Generated image is unreadable with Dark Mode from `StylishThemes/GitHub-Dark`

[Jolg42]

When using GitHub Dark https://github.com/StylishThemes/GitHub-Dark

This is what it looks like 😢

[tj]

nice haha, I forget if it's svg or what, I haven't worked on this for a while but I imagine we can make that background transparent

[Jolg42]

Yes I'm not sure why this happens 😄
More details just in case:
Happened on Firefox Developer Edition on macOS Catalina with Dark mode system-wide.