<div class="item">
  <svg width="389" height="389" viewBox="0 0 389 389" fill="none" xmlns="http://www.w3.org/2000/svg">
      <rect x="120.748" y="-4" width="300" height="300" rx="15" transform="rotate(24.5714 120.748 -4)" />
  </svg>
</div>

.item {
  background-color: blue;
  width: 400px;
  height: 300px;
  position: relative;
  clip-path: rect(0px 0px 100% 100% round 12px);
}

.item svg {
  fill: beige;
  position: absolute;
  top: -1rem;
  right: -15rem;
}