JSFiddle - React, Tailwind, and code Playground

HTML

<div class="callout"></div>


<div class="callout" style="width:300px"></div>

<div class="callout" style="width:400px"></div>

CSS

.callout {
  height: 100px;
  width: 200px;
  margin: 50px;
  background-color: #660077;
  box-shadow:0 0 0 50px #660077;
  clip-path:polygon(0 0,100% 0,100% 100%,calc(100% - 10px) 100%,calc(100% - 25px) calc(100% + 30px),calc(100% - 40px) 100%,0 100%);
}