so.svg 497 Bytes
<svg xmlns="http://www.w3.org/2000/svg" id="flag-icon-css-so" viewBox="0 0 640 480">
  <defs>
    <clipPath id="so-a">
      <path fill-opacity=".7" d="M-85.3 0h682.6v512H-85.3z"/>
    </clipPath>
  </defs>
  <g fill-rule="evenodd" clip-path="url(#so-a)" transform="translate(80) scale(.9375)">
    <path fill="#40a6ff" d="M-128 0h768v512h-768z"/>
    <path fill="#fff" d="M336.5 381.2L254 327.7l-82.1 54 30.5-87.7-82-54.2L222 239l31.4-87.5 32.1 87.3 101.4.1-81.5 54.7 31.2 87.6z"/>
  </g>
</svg>