Well, I've looked for several solutions like: *,html{ margin: 0; padding: 0;}
/ body, html{ margin: 0; padding: 0;}
, but none solved the blank spacing solution on the page, follow the code
Follow the html:
<!DOCTYPE html>
<html lang="pt-br">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!--Import Google Icon Font-->
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
<!--Import materialize.css-->
<link type="text/css" rel="stylesheet" href="css/materialize.min.css">
<!-- Import style.css-->
<link type="text/css" rel="stylesheet" href="css/style.css">
</head>
<body>
<div class="row">
<div class="col s6 l4 card-panel black first_panel">
</div>
<div class="col s6 l4 card-panel indigo lighten-1 second_panel">
</div>
<div class="col s4 l4 card-panel light-blue lighten-1 third_panel">
</div>
</div>
<div class="row">
<div class="col s6 l4 card-panel black first_panel">
</div>
<div class="col s6 l4 card-panel indigo lighten-1 second_panel">
</div>
<div class="col s6 l4 card-panel light-blue lighten-1 third_panel">
</div>
</div>
<!--Import jQuery before materialize.js-->
<script type="text/javascript" src="https://code.jquery.com/jquery-3.2.1.min.js"></script><scripttype="text/javascript" src="js/materialize.min.js"></script>
</body>
</html>
And css too:
*, html {
margin:0;
padding:0;
}
.first_panel{
height: 50vh;
}
.second_panel{
height: 50vh;
}
.third_panel{
height: 50vh;
}