drupal/core/themes/classy/css/components/tabledrag.css

/**
 * @file
 * Visual styles for table drag.
 */

tr.drag {
  background-color: #fffff0;
}
tr.drag-previous {
  background-color: #ffd;
}
body div.tabledrag-changed-warning {
  margin-bottom: 0.5em;
}