<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
  <rect width="64" height="64" rx="14" fill="#137f8f"/>
  <text x="32" y="44" font-family="Georgia, 'Times New Roman', serif" font-size="38" font-weight="600" fill="#f2fbfc" text-anchor="middle">N</text>
</svg>
