JSFiddle - React, Tailwind, and code Playground

HTML

This is some <span class="textBorder">text</span> and then some more.

CSS

.textBorder {
    background: #ffff99;
    position: relative;
}
.textBorder:after {
    content: " ";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 1px solid rgba(0,0,0,0.5);
}