cbsnexora/src/app/shared/language-selector/language-selector.component.scss

::ng-deep .mat-form-field-underline {
  background-color: white;
}

::ng-deep .mat-mdc-form-field-bottom-align::before {
  border-bottom-color: white;
}

::ng-deep .mdc-line-ripple::before {
  border-bottom-color: white;
}

::ng-deep .mdc-line-ripple::after {
  border-bottom-color: white;
}

::ng-deep .mat-mdc-form-field .mdc-line-ripple::before {
  border-bottom-color: white !important;
}

::ng-deep .mat-mdc-form-field .mdc-line-ripple::after {
  border-bottom-color: white !important;
}