@govbr-ds/core/dist/components/button/examples/button-emphasys-dark-mode.html

Padrão Digital de Governo

<div class="p-3 bg-blue-warm-vivid-90">
  <button class="br-button primary dark-mode mr-3" type="button">Primário
  </button>
  <button class="br-button secondary dark-mode mr-3" type="button">Secundário
  </button>
  <button class="br-button dark-mode" type="button">Terciário
  </button>
</div>