outline

<button class="btn btn-padding txt-s btn-outline green brc-darkgreen">Primary</button>
<button class="btn btn-padding txt-s btn-outline darkblue brc-baseblue outline-hover">Hover</button>
<button class="btn btn-padding txt-s btn-outline darkred brc-darkred outline-active">Acitve</button>
<button class="btn btn-padding txt-s btn-outline darkyellow brc-darkyellow btn-disable" disabled>Disabled</button>