http://www.thebestpageintheuniverse.net/c.cgi?u=faq Dark mode best mode

Some webmasters have spent years tweaking their layout and designing their site, and very few get any traffic. This site, as shitty as it looks, gets over 1 million visits per month. I use large fonts also as a protest against all the stylish garbage you see out there. When I go to a web site, I WANT TO READ THE CONTENT. Trust me, that micro-font everyone uses isn't nearly as original as they think. I've chosen a black background for most of my text because it's easier on the eyes than staring at a white screen. Think about it: your monitor is not a piece of paper, no matter how hard you try to make it one. Staring at a white background while you read is like staring at a light bulb (don't believe me? Try turning off the lights next time you use a word processor). Would you stare at a light bulb for hours at a time? Not if you want to keep your vision.

https://notepad-plus-plus.org/downloads/ > Settings > Preferences > Dark Mode. Settings > Style Configurator > something else.

At work? Word > File > Account > Office Theme. Open the drop-down menu and select Black.

https://addons.mozilla.org/en-US/firefox/addon/darkreader/ Use it.

Windows: Right Click > Personalization > Colors > Dark Mode

Voila