JSFiddle - React, Tailwind, and code Playground

HTML

<div><p>I have a transparent border around me, and so you can see through the border at the background.<p></div>

CSS

div{
    width:120px;
    height:120px;
    border-style:solid;
    border-width:100px;
    border-color:transparent;
    background-origin:content-box;
}
p {
    background:#00f;
}