devdocs/assets/stylesheets/pages/_laravel.scss

._laravel {
  h2 { @extend %block-heading; }
  h3 { @extend %block-label, %label-blue; }
  h4 { font-size: 1em; }

  blockquote { @extend %note; }
  blockquote.tip { @extend %note-blue; }
  p > code, h4 > code { @extend %label; }
}