You can customize HN to be darkmode friendly
After you apply and reload the page you should have a Nordic style theme that's a bit easier on the eyes.
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! Darker page background + main text color
news.ycombinator.com##body, .c00:style(background-color: #1e222a !important; color: #c8d0d9 !important;)
! Top orange bar (nav/header)
news.ycombinator.com##td[bgcolor="#ff6600"]:style(background-color: #2a2f3a !important;)
! Body content background
news.ycombinator.com##[bgcolor="#f6f6ef"]:style(background-color: #1e222a !important;)
! Full black elements background
news.ycombinator.com##[bgcolor="#000000"]:style(background-color: #2a2f3a !important;)
! Hide spacing row
news.ycombinator.com##tr#pagespace:style(display: none !important;)
! Hacker News title link
news.ycombinator.com##b.hnname > a:style(color: #8fcadb !important;)
! All links
news.ycombinator.com##a:style(color: #7fbacb !important;)
! Subtext (e.g., posted by, time)
news.ycombinator.com##.subline:style(color: #8a9c8b !important;)
! Subtext links
news.ycombinator.com##.subline a:style(color: #7aa5a8 !important;)
! Score + top navbar links
news.ycombinator.com##.score, #hnmain > tbody > tr td:last-child > span.pagetop:style(color: #d0aa55 !important;)
! Site domain (.sitestr)
news.ycombinator.com##.sitestr:style(color: #b56c70 !important;)
!Shrinks the text input box on the submit page. (Flashbang reduction)
news.ycombinator.com##textarea[name="text"]:style(width: 400px !important; height: 30px !important;)
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I got the idea from another poster and modified it a bit. I don't know why the textbox on the submit page is a locked size. But other than that little quirk I find it a lot easier on the eyes.
If anyone knows how to change the submission boxes to be a different color that would be nice as well.
I thought there was a way to post code on HN but I cannot seem to figure out the formatting. Sorry about that.