I have similar issue with dark mode applied to content - hurts my eyes. I prefer to have window chrome in dark, to make "fade away". The only application which allows me to have my cake and eat it is Firefox: I can run Windows in dark yet read web in light mode.

I wish Windows would steal this feature for the whole OS: I don't want Notepad to use dark for text, but per-app setting usually turns the whole app light.

I’ve been using these for decades:

https://www.squarefree.com/bookmarklets/zap.html

Yeah I can’t do dark mode websites because they leave an after image for some time after reading. So I made a Force Light Mode extension that just applies an inverse to any site that forces dark mode on me. Safari 27 now has some Siri extension builder, maybe it can build it for you.

I have 20/20 but for some reason cannot handle dark mode except for two things, terminal and coding and I cannot do light mode for either of those.

But whether it is my os ui or my phone ui, I feel like I can't distinguish borders and boundaries in the UI as well as I can with light mode.

Dark Reader extension can do that

Probably not the best solution but the 'Midnight lizard' extension (ff/chrome) has a range of light css templates to auto-convert websites to, given adjustable threshold brightness values.