Switches

<div class="a"></div>
<div class="b"></div>

<style>
  body {
    background: #62306d;
    display: grid;
    place-content: center;
    grid-template-columns: auto auto;
    gap: 40px;
  }

  div {
    width: 100px;
    height: 100px;
    background: #f7ec7d;
    border-radius: 50%;
  }

  .a::after {
    content: '';
    height: 100px;
    width: 100px;
    top: 50px;
    position: absolute;
    background: #aa445f;
    z-index: -1;
    border-radius: 50% 50% 0 0;
  }
  .a::before {
    content: '';
    height: 100px;
    width: 100px;
    bottom: 50px;
    left: 220px;
    position: absolute;
    background: #e38f66;
    z-index: -1;
    border-radius: 0 0 50% 50%;
  }
</style>