<h3 class="vd-heading-light">Heading 3</h3>
<h3{%if styleModifier %} class="{{ styleModifier }}"{% endif %}>{{ text }}</h3>
{
  "text": "Heading 3",
  "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.