AdminLTE/scss/dark/bootstrap/_progress.scss

.progress {
  background-color: $progress-bg-alt;
  @include box-shadow($progress-box-shadow-alt);
}

.progress-bar {
  color: $progress-bar-color-alt;
  background-color: $progress-bar-bg-alt;
}

.progress-bar-striped {
  // THIS DOES NOTHING
  // @include gradient-striped();
}