@mixin alert-variant($background, $border, $color) {
  color: $color;
  background-color: $background;
  border-color: $border;

  hr {
    border: 0;
    height: 1px;
    background-color: darken($color, 5%);
  }

  a {
    color: darken($color, 10%);
  }
}