This can give you a start.
.bg-outer .container , . , 50% , . , , , , background-color 7- .col-xs-1.
div col-xs-1, div background-color, .bg-left, .bg-right. background-color col-xs-1, , Bootstrap .
.bg-outer {
background: linear-gradient(to right, #6B6FFF 50%, #2C00C8 50%);
}
.bg-left {
background-color: #913EDD;
}
.bg-right {
background-color: #3900AB;
}
<link href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css" rel="stylesheet" />
<div class="bg-outer">
<div class="container">
<div class="row">
<div class="col-xs-1"><div class="bg-left">col</div></div>
<div class="col-xs-1"><div class="bg-left">col</div></div>
<div class="col-xs-1"><div class="bg-left">col</div></div>
<div class="col-xs-1"><div class="bg-left">col</div></div>
<div class="col-xs-1"><div class="bg-left">col</div></div>
<div class="col-xs-1"><div class="bg-left">col</div></div>
<div class="col-xs-1"><div class="bg-right">col</div></div>
<div class="col-xs-1"><div class="bg-right">col</div></div>
<div class="col-xs-1"><div class="bg-right">col</div></div>
<div class="col-xs-1"><div class="bg-right">col</div></div>
<div class="col-xs-1"><div class="bg-right">col</div></div>
<div class="col-xs-1"><div class="bg-right">col</div></div>
</div>
</div>
</div>
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