spejstore-new/static/css/admin.css

/* django-admin CSS patches */
.select2-container {
  min-width: 400px;
}

@media (prefers-color-scheme: dark) {
  /* Change the appearence of the bakground colour surrounding the search input field */
  .select2-search {
    background-color: #343a40 !important;
  }
  /* Change the appearence of the search input field */
  .select2-search input {
    color: #ffffff !important;
    background-color: #343a40 !important;
  }

  /* Change the appearence of the search results container */
  .select2-results {
    background-color: #343a40 !important;
  }

  /* Change the appearence of the dropdown select container */
  .select2-container .select2-selection {
    border-color: #6c757d !important;
    color: #ffffff !important;
    background-color: #343a40 !important;
  }

  /* Change the caret down arrow symbol to white */
  .select2-container .select2-selection__arrow b {
    border-color: #fff transparent transparent transparent !important;
  }

  /* Change the color of the default selected item i.e. the first option */
  .select2-container .select2-selection--single .select2-selection__rendered {
    color: #ffffff !important;
  }
}