Administrator - Mayor
in dark mode, your pupil needs to expand to let in more light. When you see light text on a dark screen, the edges of it seem to bleed into the black background. This is called the halation effect (via Make Tech Easier) and it reduces ease of reading.That would be a lot of ink and somehow printing everything BUT the letters on the page using a printing press, or printing solid black pages and then somehow printing white lettering on top of it. I'm pretty sure that's why it's not done.
I use a dark theme on my Gmail and Facebook apps on my phone, and I prefer it; easy on the eyes and battery.
Remember, the eye is made up of muscles. The more strain you put on it trying to read something, the more it’ll get worn out. If you are not comfortable reading light text on a dark background, don’t force it.