JSFiddle - React, Tailwind, and code Playground

HTML

<div class="foo">121</div>

CSS

.foo {
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" version="1.1"><rect width="300" height="100" style="fill:rgb(0,0,255);stroke-width:1;stroke:rgb(0,0,0)"/></svg>');
    height: 200px;
}