Images inverted in dark mode

It's very nice to have dark mode. I understand dealing with figures is tricky in this context. Is inverting them the desired solution? A screenshot of the git lesson is below.
The webcomic is a little odd, but the diagram below is rather unreadable. Thoughts?


Start by reproducing the inverted images in dark mode using the linked git lesson screenshot and trace where dark-mode image styling is defined. Done means the diagram and webcomic remain readable in dark mode without making the surrounding page unusable.

Written by the indexing model from the issue text.