#css
<div class="panel panel-primary panel-transparent">
<div class="panel-heading">
<h3 class="panel-title">Panel primary</h3>
</div>
<div class="panel-body">
Panel content
</div>
</div>
body {
background:#c33;
}
.panel-transparent {
background: none;
}
.panel-transparent .panel-heading{
background: rgba(122, 130, 136, 0.2)!important;
}
.panel-transparent .panel-body{
background: rgba(46, 51, 56, 0.2)!important;
}