stroke and fill

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>
​
<svg viewBox="0 0 50 50">
<circle cx="15" cy="7" r="1.72" fill="none" stroke="green"/>
<text x="0" y="14" stroke="green" fill="none" stroke-width="0.16%">G</text>
</svg>
​
<body>
<script>
</script>
</body>
​
    

https://d3js.org/d3.v4.min.js