Let me switch instantly between light mode during the day, and dark mode at night, using one simple toggle, or following changes in browser settings. Then the issues with how dark or how light become nearly moot.
Hmmmmmm. Wonder why Github has bugs with the world's most popular browser, but doesn't have bugs with a (very similar) browser made by their owners ./s
(It's mostly a bug, or a setting in Chrome to not ask websites to use dark mode.)