app/assets/images/open_iconic/warning.svg
<svg xmlns="http://www.w3.org/2000/svg" width="8" height="8" viewBox="0 0 8 8">
<path d="M3.09 0c-.06 0-.1.04-.13.09l-2.94 6.81c-.02.05-.03.13-.03.19v.81c0 .05.04.09.09.09h6.81c.05 0 .09-.04.09-.09v-.81c0-.05-.01-.14-.03-.19l-2.94-6.81c-.02-.05-.07-.09-.13-.09h-.81zm-.09 3h1v2h-1v-2zm0 3h1v1h-1v-1z" />
</svg>