background-clip

значения свойства:

border-box
padding-box
content-box

css/style.css

* {
margin: 0;
padding: 0;
}
.main {
height: 600px;
width: 900px;
position: absolute;
top: 50%;
left: 50%;
margin-top: -300px;
margin-left: -450px;
}
.wrapper {
width: 33.3%;
height: 100%;
float: left;
}
#div1, #div2, #div3 {
height: 250px;
width: 250px;
float: left;
position: relative;
top: 50%;
left: 50%;
margin-top: -125px;
margin-left: -125px;
border: 5px dotted #00F;
background-color: #A3E61D;
padding: 15px;
}
#div1 {
background-clip: border-box;
}

* {
 margin: 0;
 padding: 0;
}

.main {
 height: 600px;
 width: 900px;
 position: absolute;
 top: 50%;
 left: 50%;
 margin-top: -300px;
 margin-left: -450px;
}

.wrapper {
 width: 33.3%;
 height: 100%;
 float: left;
}

#div1, #div2, #div3 {
 height: 250px;
 width: 250px;
 float: left;
 position: relative;
 top: 50%;
 left: 50%;
 margin-top: -125px;
 margin-left: -125px;
 border: 5px dotted #00F;
 background-color: #A3E61D;
 padding: 15px;
} 

#div1 {
 background-clip: border-box;
}

index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<link href="css/style.css" rel="stylesheet" />
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
</head>
<body>
<div class="main">
<div class="wrapper">
<div id="div1">
I was dreaming about Hawaii. I was dreaming about my holiday. In my dream, I was on the beach in Hawaii. The hot sun was shining on my face. The sound of the sea was all around me. But it was a dream. Three weeks ago, I had been lying on a beach in Hawaii. But I was not in Hawaii now. I was dreaming in my office in Los Angeles.
</div>
</div>
<div class="wrapper">
<div id="div2">
I was dreaming about Hawaii. I was dreaming about my holiday. In my dream, I was on the beach in Hawaii. The hot sun was shining on my face. The sound of the sea was all around me. But it was a dream. Three weeks ago, I had been lying on a beach in Hawaii. But I was not in Hawaii now. I was dreaming in my office in Los Angeles.
</div>
</div>
<div class="wrapper">
<div id="div3">
I was dreaming about Hawaii. I was dreaming about my holiday. In my dream, I was on the beach in Hawaii. The hot sun was shining on my face. The sound of the sea was all around me. But it was a dream. Three weeks ago, I had been lying on a beach in Hawaii. But I was not in Hawaii now. I was dreaming in my office in Los Angeles.
</div>
</div>
</div>
<script>
/*JavaScript*/
document.getElementById("div2").style.backgroundClip = "padding-box";
/*jQuery*/
$(document).ready(function () {
$("#div3").css({ "background-clip": "content-box" });
});
</script>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<link href="css/style.css" rel="stylesheet" />
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
</head>
<body>
<div class="main">
<div class="wrapper">
<div id="div1">
I was dreaming about Hawaii. I was dreaming about my holiday. In my dream, I was on the beach in Hawaii. The hot sun was shining on my face. The sound of the sea was all around me. But it was a dream. Three weeks ago, I had been lying on a beach in Hawaii. But I was not in Hawaii now. I was dreaming in my office in Los Angeles.
</div>
</div>
<div class="wrapper">
<div id="div2">
I was dreaming about Hawaii. I was dreaming about my holiday. In my dream, I was on the beach in Hawaii. The hot sun was shining on my face. The sound of the sea was all around me. But it was a dream. Three weeks ago, I had been lying on a beach in Hawaii. But I was not in Hawaii now. I was dreaming in my office in Los Angeles.
</div>
</div>
<div class="wrapper">
<div id="div3">
I was dreaming about Hawaii. I was dreaming about my holiday. In my dream, I was on the beach in Hawaii. The hot sun was shining on my face. The sound of the sea was all around me. But it was a dream. Three weeks ago, I had been lying on a beach in Hawaii. But I was not in Hawaii now. I was dreaming in my office in Los Angeles.
</div>
</div>
</div>
<script>
/*JavaScript*/
document.getElementById("div2").style.backgroundClip = "padding-box";
/*jQuery*/
$(document).ready(function () {
$("#div3").css({ "background-clip": "content-box" });
});
</script>
</body>
</html>