JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box radius outline"></div>

CSS

.box{
    margin: 30px;
    border: 10px solid black;
    width: 150px;
    height: 150px;
    background-color: gold;
}

.radius{
    border-radius: 50px;
}

.outline{
    outline: 5px solid black;
    outline-offset: -10px;
}