Dovetail

<svg xmlns="http://www.w3.org/2000/svg" width="55.172" height="64" fill="none" viewBox="0 0 50 58">
  <g fill="#230078" fill-rule="evenodd" clip-path="url(#a)" clip-rule="evenodd">
    <path d="m50 35.714-12.5 7.143V28.572L25 21.338l12.5-7.053L50 21.429zM25 21.429 12.5 28.57V14.286L0 7.143 12.5 0 25 7.143zM25 50l-12.5 7.143V42.857L0 35.714l12.5-7.143L25 35.714z"/>
  </g>
  <defs>
    <clipPath id="a">
      <path fill="#fff" d="M0 0h50v57.143H0z"/>
    </clipPath>
  </defs>
</svg>