<!DOCTYPE html>
<style>
.box {
width: 100px;
height: 100px;
background-color: rgba(100, 100, 0, 0);
}
</style>
<body>
<div class='box'></div>
</body>
<!DOCTYPE html>
<style>
.box {
width: 100px;
height: 100px;
background-color: rgba(100, 100, 0, 0);
}
</style>
<body>
<div class='box'></div>
</body>