<svg xmlns="http://www.w3.org/2000/svg" id="flag-icon-css-cz" viewBox="0 0 512 512">
  <path fill="#ffffff" d="M0 0h512v256H0z"/>
  <path fill="#d7141a" d="M0 256h512v256H0z"/>
  <path fill="#11457e" d="M300 256 0 56V456z"/>
</svg>