AdminLTE/scss/dark/bootstrap/_toasts.scss

.toast {
  color: $toast-color-alt;
  background-color: $toast-background-color-alt;
  border: $toast-border-width solid $toast-border-color-alt;
  box-shadow: $toast-box-shadow-alt;

  // DO I NEED THIS?
  // &:not(.showing):not(.show) {
  //   opacity: 0;
  // }
}

.toast-header {
  color: $toast-header-color-alt;
  background-color: $toast-header-background-color-alt;
  border-bottom: $toast-border-width solid $toast-header-border-color-alt;
}