ngx-admin/src/app/@theme/styles/material/_angular-material.scss

@import '~@angular/material/theming';

@mixin angular-material() {
  @include mat-core();

  @include nb-for-theme(material-dark) {
    $custom-dark-theme: mat-dark-theme(mat-palette($mat-pink), mat-palette($mat-blue-grey));
    @include angular-material-theme($custom-dark-theme);
  }

  @include nb-for-theme(material-light) {
    $custom-light-theme: mat-light-theme(mat-palette($mat-indigo), mat-palette($mat-pink));
    @include angular-material-theme($custom-light-theme);
  }
}