Comment by licyeus

I use stylish to apply my own (quick and easy) dark mode to hckr news:

  @media (prefers-color-scheme: dark) {
    body { background-color: #444; color: #ccc; }
    .entries a:hover { background-color: #666; }
    .c00 { color: #ccc; }
    a:link, .c00 a:link { color: #ddd; }
    textarea { background-color: #555; color: #ddd; }
    .pagetop { color: #ddd; }
    .pagetop a { color: #eee !important; }
    #hnmain > tbody:first-child > tr:first-child td { background-color: #630; }
  }