The interesting part is that the body text appears to have a 5.71 contrast ratio, which meets the WCAG 2.1 Level AA criterion [1] but not Level AAA. I wonder if folks pursuing dark themes are making sure to give enough consideration to contrast.
Oddly enough, this is actually one of the reasons I prefer Chrome Dev Tools. They've been adding a lot of accessibility-focused features [2][3], and as it relates to my question, it seems much easier get some of these essential details from Chrome Dev Tools than Firefox.
[1] https://www.w3.org/TR/WCAG21/#contrast-minimum
[2] https://developers.google.com/web/tools/chrome-devtools/acce...
[3] https://developers.google.com/web/updates/2019/01/devtools#i...