portfolio/public/favicon.svg

<svg
  xmlns="http://www.w3.org/2000/svg"
  width="512"
  height="512"
  viewBox="0 0 512 512"
>
  <style>
    @media (prefers-color-scheme: dark) {
      #background {
        fill: #161a1b;
      }
      #logomark {
        fill: #e7eef4;
      }
    }
  </style>
  <g fill="none" fill-rule="evenodd">
    <rect id="background" fill="#e7eef4" width="512" height="512" />
    <path
      id="logomark"
      fill="#6b7f88"
      d="M397,91 L421,115 L114,421 L91,398 L397,91 Z M397,182 L421,206 L205,421 L182,398 L397,182 Z M307,91 L330,115 L114,330 L91,307 L307,91 Z"
    />
  </g>
</svg>