JSFiddle - React, Tailwind, and code Playground

HTML

<div class="block yellow"></div>
<div class="block purple"></div>

CSS

html, body {
    margin: 0;
    padding: 0;
}
.block {
    border: 1px solid #8D8D8D;
    width: 66%;
    height: 100px;
}
.yellow {
    background-color: #FEFD8F;
    margin: 10px auto 10px 10px;
}
.purple {
    background-color: #F6CCFC;
    margin: 10px 10px 10px auto;
}