@collab-ui/core/scss/components/icon/examples/white.html

Cisco Collab UI CSS Framework

<div style="background-color: black; padding: 5px; width: fit-content;">
  <button class="cui-button cui-button--36 cui-button--icon cui-button--icon-white" alt="Clear" type="button" aria-label="Clear">
    <span class="cui-button__children" style="opacity: 1;">
      <i style="color: white;" class="cui-icon icon icon-clear-active_24">
      </i>
    </span>
  </button>
</div>