JSFiddle - React, Tailwind, and code Playground

HTML

<div id="background">
    <div class="circle">
    </div>
</div>

CSS

#background{
    width:100%;
    height:100%;
    position:absolute;
    top:0;
    left:0;
    background:#ffff99;
    white-space: nowrap;
	text-align:center;
    overflow: hidden;
}
#background:before{
    content: "";
    display: inline-block;
    vertical-align: middle;
    height: 100%;
}
.circle{
    width:200px;
    height:200px;
    position:relative;
    border-radius:50%;
    border: 1000px solid #999;
    display: inline-block;
    vertical-align: middle;
    white-space: normal;
    position: relative;
    left: -900px;
    top: -900px;
}