<span
  class="icon"
  role="img"
  aria-label="rocket"
>
  🚀
</span>

body {
  background-image: linear-gradient(320deg, thistle 0%, indigo 70%);
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  
  span {
    font-size: 5rem;
  }
}

.icon {
  color: transparent; /* Hides the actual Emoji */
  text-shadow: 0 0 0 aquamarine; /* Shows the silhouette */
}