grafana/public/less/tabs.less

.nav-tabs-alt {
  border-bottom: @grafanaTriggerBorder;
  padding-left: 10px;
  margin: 0;

	& > li > a {
	  color: darken(@linkColor, 20%);
	}

	li > a:hover {
    border-bottom: none;
	}

	li.active > a,
	li.active > a:focus,
	li.active > a:hover {
    .border-radius(3px);
		border: @grafanaTriggerBorder;
	  background-color: transparent;
	  border-bottom: 1px solid @grafanaPanelBackground;
	  color: @linkColor;
	}

	li.disabled > a {
		color: @textColor;
	}

	.open .dropdown-toggle {
		background-color: #060606;
		border-color: transparent;
	}
}

.tab-content {
  padding: 10px;
  background-color: @grafanaPanelBackground;
}