invoiceninja/resources/assets/css/colors.css

body {
  background-color: #f8f8f8;
}

.nav-tabs.nav-justified>.active>a, .nav-tabs.nav-justified>.active>a:hover, .nav-tabs.nav-justified>.active>a:focus {
    background-color: #337ab7;
}

.navbar .dropdown-menu {
    border-top: 1px solid #337ab7;
}

.active-clients {
    background-color: #337ab7;
}

.pagination>.active>a, .pagination>.active>span, .pagination>.active>a:hover, .pagination>.active>span:hover, .pagination>.active>a:focus, .pagination>.active>span:focus {
    background-color: #337ab7;
    border-color: #337ab7;
}

.navbar,
.navbar-collapse {
    background-color: #337ab7 !important;
}

.panel-heading {
    background-color: #286090 !important;
}


table.dataTable thead > tr > th,
table.invoice-table thead > tr > th {
    background-color: #777 !important;
    color:#fff;
}

thead th {
    border-left: 1px solid #999;
}

.sidebar-nav {
    background-color: #313131;
}

.sidebar-nav li {
    border-bottom:solid 1px #444444;
}

.sidebar-nav i.fa {
    color: white;
}

.menu-toggle i,
.sidebar-nav li > a {
    color: #999999;
}

.menu-toggle:hover i,
.sidebar-nav li:hover > a,
.sidebar-nav li > a.active {
    color: #fff;
}

.sidebar-nav li:hover,
.sidebar-nav li.active {
    background: rgba(255,255,255,0.1);
}

.menu-toggle {
    color: #999 !important;
}

.menu-toggle:hover {
    color: #fff !important;
}