JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer">
    <div class="inner">
        <div class="content">
            Just some text.<br>
            Could be other stuff,<hr>
            In here too.
        </div>
    </div>
</div>

CSS

body{
    background-color:#545454;
}
.outer{
    border: 2px solid black;
    padding: 3px;
    border-radius:4px;
    width:200px;
    height:200px;
    background-color:#858585;
}
.inner{
    background-color:#545454;
    width:196px;
    height:196px;
    border-radius:4px;
    border:2px solid black;
}
.content{
    color:white;
    padding:5px;
}