@mixin notification-variant($tone) {
  .notification-header {

    .notification-title {
      @if ($tone == 'dark') {
        color: $notification-dark-title;
      }
      @else {
        color: $notification-light-title;
      }
    }

    .icon-close {
      .icon {
        @if ($tone == 'dark') {
          background-image: $close-dark-bg;
        }
        @else {
          background-image: $close-light-bg;
        }
      }
    }
  }
}