discourse/app/assets/stylesheets/desktop/components/user-stream-item.scss

// Desktop styles for "user-stream-item" component
.user-stream {
  .time,
  .delete-info,
  .draft-type {
    margin-right: 8px;
  }

  .notification {
    &.unread {
      background-color: $tertiary-low;
    }
  }
}