De class .dso-info-open (bij getoonde toelichting) maakt de button groen.
<!-- Default -->
<button type="button" class="btn dso-info-button" aria-expanded="">
    <span class="sr-only">
        Toelichting
    </span>
</button>
    
      
<!-- Toggle Info Active -->
<button type="button" class="btn dso-info-button dso-open" aria-expanded="true">
    <span class="sr-only">
        Toelichting
    </span>
</button>
    
  
<button type="button" {{ className('btn dso-info-button', [infoOpen, 'dso-open']) }} aria-expanded="{{ infoOpen }}">
  <span class="sr-only">
    Toelichting
  </span>
</button>
  /* Default */
__title: default
      
        /* Toggle Info Active */
__title: open
infoOpen: true