Hacker News Reader

Interesting, because HN's CSS only goes as high as #ddd.

Also, you can use text selection via mouse or appropriate touch gesture in order to read even the lightest-colored comment.

If you use Firefox, something I made a while ago might be useful to you, I certainly wouldn't want to read HN without anymore: https://pastebin.com/8StFpps9

To make comments readable, only the lines from 86 to 106 are needed.

I'm actually fine with HN's system because I think most of us know how to get at text which appears unreadable. But this seems like a very fair & reasonable suggestion.