<div class="container">
<div class="row">
<div style="background-color: #efefef;" class="col-sm text-center">
Inhalt Grid 1
</div>
<div style="background-color: #cccccc;" class="col-sm text-center">
Inhalt Grid 2
</div>
<div style="background-color: #c1c1c1;" class="col-sm text-center">
Inhalt Grid 3
</div>
</div>
</div>