wave.svg

<svg xmlns="http://www.w3.org/2000/svg" width="1600" height="198">
  <defs>
    <linearGradient id="a" x1="50%" x2="50%" y1="-10.959%" y2="100%">
      <stop stop-color="#57BBC1" stop-opacity=".25" offset="0%"/>
      <stop stop-color="#015871" offset="100%"/>
    </linearGradient>
  </defs>
  <path fill="url(#a)" fill-rule="evenodd" d="M.005 121C311 121 409.898-.25 811 0c400 0 500 121 789 121v77H0s.005-48 .005-77z" transform="matrix(-1 0 0 1 1600 0)"/>
</svg>