/* These are the KEY styles - you can add them directly to any object you want in your project */
.fancy-border-radius {
border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
/* These are ADDITIONAL styles - add them if you want an object exactly like in the demo above */
width: 400px;
height: 400px;
background: #ad5389;
background: -webkit-linear-gradient(
to right,
#3c1053,
#ad5389
);
background: linear-gradient(
to right,
#3c1053,
#ad5389
);
}
<div class="fancy-border-radius"></div>