static/css/style-dark.css

.dark-theme,
.dark-theme .modal-content,
.dark-theme table {
  background-color: #1b1b1b;
  color: ghostwhite;
}

.dark-theme .alert-info {
  color: #def;
  border-color: #258;
  background-color: #0a2a4a;
}
.dark-theme .alert-info .alert-link {
  color: white;
}
.dark-theme .alert-success {
  color: #d4edda;
  border-color: #285;
  background-color: #155724;
}
.dark-theme .alert-success .alert-link {
  color: lightcyan;
}
.dark-theme .alert-warning {
  color: #dca;
  border-color: #885;
  background-color: #221900;
}
.dark-theme .alert-warning .alert-link {
  color: ivory;
}
.dark-theme .alert-danger {
  color: #f6e6e7;
  border-color: #9a414a;
  background-color: #36060b;
}
.dark-theme .alert-danger .alert-link {
  color: #ffe6e7;
}

.dark-theme .bg-light {
  background-color: #555 !important;
}
.dark-theme .bg-dark {
  background-color: black !important;
}
.dark-theme .text-muted {
  color: rgb(180,180,180) !important;
}
.dark-theme .form-control, 
.dark-theme .form-control:active, 
.dark-theme .table .thead-light th,
.dark-theme .custom-file-label {
  background-color: #101010;
  border-color: #606060;
  color: ghostwhite;
}
.dark-theme .custom-file-label::after,
.dark-theme .nav-tabs .nav-link.active {
  background-color: #222;
  border-color: #606060;
  color: ghostwhite;
}

.dark-theme .table td, .dark-theme .table th {
  border-top: 1px solid #888;
}

.dark-theme .nav-tabs {
  border-bottom: 1px solid lightslategray;
}

.dark-theme .text-primary {
  color: #399fff !important;
}
.dark-theme .text-dark {
  color: #f0ffef!important;
}

.dark-theme a:not(.btn) {
  color: darkturquoise;
}

.dark-theme .custom-control-label::before {
  background-color: #222;
}
.dark-theme .border-dark {
  border-color: #888 !important;
}
.dark-theme .form-control:disabled,
.dark-theme .custom-file-input:disabled~.custom-file-label,
.dark-theme .custom-control-input:disabled~.custom-control-label::before {
  background-color: #444 !important;
  color: lightgray !important;
}
.dark-theme .btn-outline-secondary {
  color: lightgray;
  border-color: lightgray;
}
.dark-theme .btn-outline-danger {
  color: rgb(255, 50, 50);
  border-color: rgb(255, 50, 50);
}
.dark-theme .btn-outline-danger:hover {
  color: white;
}
.dark-theme .page-link {
  color: #399fff;
  background-color: #606060;
}

.dark-theme kbd {
  background-color: #555555;
  white-space: nowrap;
}
.dark-theme code {
  color: #ff70b3;
}
.dark-theme pre code {
  color: beige;
}
.dark-theme .figure-img, 
.dark-theme .carousel-item img {
  filter: brightness(85%);
}
.dark-theme .figure-caption {
  color: lightgray;
}

.dark-theme .popover {
  color: #212529;
}

.dark-theme .table-hover tbody tr:hover {
  color: beige;
  background-color: #555555;
}

.dark-theme #github-icon {
  color: white !important;
}

.dark-theme .dragDropDisplay {
  background: linear-gradient(0deg, rgba(30,30,30,0.6), rgba(30,30,30,0.6)), 
              url('../images/dragover_bg.png') repeat;
}