<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
  <circle cx="256" cy="256" r="230" fill="#0B1220"/>
  <g fill="#FFFFFF" font-family="NanumSquareRound, NanumSquare, Nanum Gothic, Noto Sans CJK KR, sans-serif" font-weight="800" text-anchor="middle">
    <text x="256" y="213" font-size="172">ㅈ</text>
    <text x="256" y="380" font-size="208">ㅁ</text>
  </g>
</svg>