2.6 #permalink h6 / .h6

Toggle example guides Toggle HTML markup

Specify a heading level 6. For accessibility reasons, H6 elements should not follow a heading element of a lower level, therefor use the provided class with the same name to apply the visual appearance of a H6 to other elements.

Example
Headline H6

Headline H6

Markup 
<h6>Headline H6</h6>
<p class="h6">Headline H6</p>
Source: typo.css, line 161