JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <div>black</div>
    <div>white</div>
</div>

CSS

div {
    border: 1px solid black;
    padding: 1px;
    float: left;
}
div div {
    float: left;
    border: none;
    font-size: 5em;
    text-transform: uppercase;
    font-family: Arial;
}
div div:nth-child(2) {
    background: black;
    color: white;
}