代码示例:(标识:css_outline-color_invert)
<!DOCTYPE html>
<html>
<head>
<style>
p.ex1 {
  border: 1px solid yellow;
  outline-style: solid;
  outline-color: invert;
}
</style>
</head>
<body>

<h1>使用 outline-color:invert</h1>

<p class="ex1">invert 实线轮廓</p>

</body>
</html>
运行结果: