genezeta an hour ago
And you can contact hn@ycombinator.com if you're serious. But I'm not sure they do actually accept contributions. And anyway a dark mode is something that has been talked about for years and there doesn't seem to be much interest in adding it to the site. You may try other -external- options to add a dark mode through a browser extension.
alexander2002 2 hours ago
0xf93 2 hours ago