:root {
  --primary-color: #c00;
  --secondary-color: #333;
}

.document-type-tiles a.document-type-questions { background-color: #2a5587; }
.document-type-tiles a.document-type-rib { background-color: #ffb60a; }
.document-type-tiles a.document-type-received { background-color: #d63333; }