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<!DOCTYPE html>
<title>CSS Borders Reference: double outline with tricky ellipses</title>
<style>
body {
margin: 0;
}
.container {
padding: 40px;
}
.test {
margin: 150px auto;
width: 40px;
height: 100px;
border: 5px solid green;
box-shadow: 0 0 0 90px red;
border-radius: 50%;
outline: 30px double blue;
outline-offset: 15px;
}
</style>
<div class="container">
<div class="test"></div>
</div>