Push Button

<div id="rectangle"></div>
<div id="circle"></div>
<style>
  body {
    background: #6592cf;
    display: grid;
    place-items: center;
  }
  #rectangle {
    width: 300px;
    height: 150px;
    background: #243d83;
  }

  #circle {
    position: absolute;
    height: 250px;
    width: 250px;
    background: radial-gradient(
      #eeb850 0 24px,
      #243d83 25px 75px,
      #6592cf 76px 180px
    );
    border-radius: 50%;
  }
</style>