JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box">
    <div class="box-inner"></div>
</div>

CSS

.box {
    height: 200px;
    border: 3px dashed green;
    background-color: blue;
}

.box-inner {
    height: 200px;
    background-color: white;
}