SOURCE

<div class='d1'></div>
<br/>
<div class='d2'></div>
<br/>
<div class='d3'></div>
<br/>

body{
    font-size: 0;
}
div{
    width:200px;
    height:200px;
    display:inline-block;
}
.d1{
    background-color: red;
    display: inline-block;
}
.d2{
    background-color:blue;
    display:inline-block;
}
.d3{
    background-color:yellow;
    display: inline-block;
    opacity: 0.5;
}
input{
    height: 100px;
    width: 100px;
    display: block;
    outline: none;
}