pyfedi/app/static/scss/_high_contrast.scss

@media (prefers-contrast: more) {
  :root {
    --bs-link-color: black;
    --bs-link-color-rgb: black;
    --bs-link-hover-color-rgb: #333;
  }

  [data-bs-theme="dark"] {
      --bs-body-bg: black;
      --bs-link-color: white;
      --bs-link-color-rgb: white;
      --bs-link-hover-color-rgb: #eee;
      --bs-heading-color: white;
      --bs-body-color: white;
      --bs-body-color-rgb: white;
  }

  .btn-primary {
      --bs-btn-bg: black;
      --bs-btn-border-color: black;
      --bs-btn-hover-bg: #333;
  }
  [data-bs-theme="dark"] .btn-primary {
      --bs-btn-bg: white;
      --bs-btn-border-color: white;
      --bs-btn-hover-bg: white;
      --bs-btn-color: black;
  }
  [data-bs-theme="dark"] .btn-primary:hover {
      --bs-btn-hover-color: black;
  }

  .btn-outline-secondary {
      --bs-btn-color: black;
  }
  [data-bs-theme="dark"] .btn-outline-secondary {
      --bs-btn-color: white;
  }

  .post_list .post_teaser {
      border-bottom: solid 1px black;
  }
  [data-bs-theme="dark"] .post_list .post_teaser {
      border-bottom: solid 1px white;
  }

  .domain_link, .domain_link a {
      color: black;
  }
  [data-bs-theme="dark"] .domain_link, [data-bs-theme="dark"] .domain_link a {
      color: ghostwhite;
  }

  .main_pane, .voting_buttons div {
      border: solid 1px #333;
  }
  [data-bs-theme="dark"] .main_pane, [data-bs-theme="dark"] .voting_buttons div {
      border: solid 1px #eee;
  }

  div.navbar {
      border-bottom: solid 1px #333;
  }
  [data-bs-theme="dark"] div.navbar {
      border-bottom: solid 1px #fff;
  }

  .nav-link {
      color: black;
  }
  [data-bs-theme="dark"] .nav-link {
      color: white;
  }

  .card {
      --bs-card-border-color: #333;
  }
  [data-bs-theme="dark"] .card {
      --bs-card-border-color: #fff;
  }

  .coolfieldset.collapsed legend, .coolfieldset legend, .coolfieldset.expanded legend {
      background-color: white;
  }
  [data-bs-theme="dark"] .coolfieldset.collapsed legend, [data-bs-theme="dark"] .coolfieldset legend, [data-bs-theme="dark"] .coolfieldset.expanded legend {
      background-color: black;
  }
}