JSFiddle - React, Tailwind, and code Playground

by web tiki

HTML

<div class="cutout"></div>

CSS

body {
    padding: 50px;
}


.cutout {
    height: 88px;
    width: 88px;
    position:relative;
    background:#808080;
  
}
.cutout:after{
    content:'';
    position:absolute;
    width:30px;
    height:30px;
    border-radius: 50%;
    background:#fff;
    left:29px;
    top:-15px;
    
    box-shadow: 0px 88px 0px 0px #fff, 44px 44px 0px 0px #fff, -44px 44px 0px 0px #fff;
    -webkit-box-shadow: 0px 88px 0px 0px #fff, 44px 44px 0px 0px #fff, -44px 44px 0px 0px #fff;
}