Comments get further and further greyed out as they are voted down more and more, to the point where they do become unreadable. I've manually opened dev-tools just to read comments before. This is not an accessibility issue, this is definitely a censorship issue. Why should an unpopular opinion get greyed out to the point it's unreadable?

I don't have accessibility issues and I don't make this up. I've seen comments with a text color of #eee, I had to go into the inspector to make it readable.. Maybe that has been changed/fixed already which would make my entire comment pointless indeed. Personally I think grey out text should not exceed about #ccc.

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.