SVG inline

Simply copy/paste this into your HTML:

<svg class="humbleicons hi-brand-x" xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="none" viewBox="0 0 24 24"><path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="m18 4-5 6.667M6 20l5-6.667m2-2.666L8.3 4.4a1 1 0 0 0-.8-.4H4l7 9.333m2-2.666L20 20h-3.5a1 1 0 0 1-.8-.4L11 13.333"/></svg>

SVG sprite

Download the sprite file and address the icon by its slug:

<svg class="humbleicons"><use xlink:href="humbleicons.svg#brand-x"/></svg>