<h4 class="vd-heading-light">Heading 4</h4>
<h4{%if styleModifier %} class="{{ styleModifier }}"{% endif %}>{{ text }}</h4>
{
  "text": "Heading 4",
  "styleModifier": "vd-heading-light"
}

The Section Title is obtained with the .vd-section-title class.

The Icon Title is obtained with the .vd-icon-title class.