How to change the color of ngb-tabset type="pills"?

Question

I'm using angular 6 and ng-bootstrap. I want to change the background color of <ngb-tabset type="pills">

.nav-fill .nav-link.active {
    margin-top: -1px;
    border-top: 2px solid #20a8d8;
}

.nav-pills .nav-link.active, .nav-pills .show > .nav-link {
    color: #fff;
    background-color: #20a8d8;
}

I cannot override those in component.scss even if I use !important Those are inline styles. I don't know where they are located, searched the whole project couldn't find them.

Answer 1

Since the pills are in a child component (NgbTabset), you have to use a shadow-piercing descendant combinator to apply the styles. At the present time, Angular recommends using ::ng-deep:

::ng-deep .nav-fill .nav-link.active {
    margin-top: -1px;
    border-top: 2px solid #20a8d8;
}

::ng-deep .nav-pills .nav-link.active, 
::ng-deep .nav-pills .show > .nav-link {
    color: #fff;
    background-color: #20a8d8;
}

See this stackblitz for a demo.