devdocs/assets/stylesheets/pages/_d.scss

._d {
  h2 { @extend %block-heading; }
  h3, .d_decl { @extend %block-label, %label-blue; }
  .d_decl { @extend %code; }
  .d_decl > small { color: $textColorLight; }
  .d_decl > strong { font-weight: $bolderFontWeight; }

  p > code, li > code, td > code, dd > code { @extend %label; }

  span.red { color: $textColorRed; }
}