That one felt a bit contrived since it's highlighting an comment that has been downvoted almost to oblivion. The low contrast is a warning that the content is probably not worth your time. The low contrast is a feature, not a bug.
That's the text of a text post. The same issue can be seen here: https://news.ycombinator.com/item?id=26739220
This also confuses the hell out of me, I always "read" them as "heavily downvoted comment" only to realize "hey, no, that's a question! Why does HN style it like that?".
Every time.