<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 50" width="160" height="40">
  <rect width="200" height="50" rx="4" fill="#424242"/>
  <text x="100" y="32" font-family="Arial, sans-serif" font-size="16" font-weight="bold" fill="#FFFFFF" text-anchor="middle">Marca Ejemplo</text>
</svg>
