body{
    background:#F2F1F2;
}
.container{
    background:#1A1B20;
}
.left-nav{
    background:#1A1B20;
}

.left-nav a{
    color:rgba(255,255,255,.7);
}
.left-nav a.active{
    background: #009688 !important;
    color: #fff;
}
.left-nav a:hover{
    background: #009688 !important;
    color: #fff;
}