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<!DOCTYPE html>
<html>
<head>
<style>
div {
  background-color: #4CAF50;
  padding: 10px;
}
​
div.first {
  opacity: 0.1;
}
​
div.second {
  opacity: 0.3;
}
​
div.third {
  opacity: 0.6;
}
</style>
</head>
<body>
​
<h1>The opacity Property</h1>
​
<p>The opacity property adds transparency to the background of an element, and to all of its child elements as well. This makes the text inside a transparent element hard to read:</p>
​
<div class="first"><p>opacity 0.1</p></div>
<div class="second"><p>opacity 0.3</p></div>
<div class="third"><p>opacity 0.6</p></div>
<div><p>opacity 1 (default)</p></div>
​
</body>
​
<!-- Mirrored from www.w3schools.com/cssref/tryit.asp?filename=trycss3_opacity_box by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:01:20 GMT -->
</html>
​
​
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