<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
  <rect width="64" height="64" rx="12" fill="#1B4FDB"/>
  <text x="50%" y="54%" dominant-baseline="middle" text-anchor="middle" font-family="Georgia,serif" font-size="38" font-weight="700" fill="white">R</text>
</svg>
