I was glad to see the idea of adding a night mode in the report. I had looked into hacks to turn wikipedia to something like night mode, but didn't like the results, so I realize setting this up wouldn't be trivial. If it was available I would likely switch to it, though. I would especially like if it was available in the mobile view as well. When I read on my phone at night and then use the right-click lookup for a word, having wikipedia pop up in all its brightness is jarring.
Topic on Talk:Reading/Web/Desktop Improvements/Repository/First Prototype Feedback Report
These aging eyes would also like to see a night mode.
You might be interested in the Dark theme I've made this winter.