JSFiddle - React, Tailwind, and code Playground

HTML

<div class="stripe">
  <div class="circle">
  </div>
</div>

CSS

.stripe {
  background-color: #B7B7B7;
  height: 13vh;
}

.circle{
  background:white;
  width:10%;
  height:100%;
  border-radius:00px 50px 50px 0px;
}