为svg背景图标添加颜色

.icon {
  background-image: url('icon.svg');
  background-color: #ff0000; /* 设置背景颜色为红色 */
}

<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
  <path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-1-13h2v6h-2zm0 8h2v2h-2z" fill="#ff0000" /> <!-- 设置填充颜色为红色 -->
</svg>

<svg id="icon" xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
  <path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-1-13h2v6h-2zm0 8h2v2h-2z" />
</svg>

<script>
  var icon = document.getElementById('icon');
  icon.querySelector('path').setAttribute('fill', '#ff0000'); // 设置填充颜色为红色
</script>