How to add a custom class without replacing 'toast'?

Sorry if this is answered somewhere, but I want to add some custom styles to an individual toast popup (e.g. increase width). I see the toastClass config option - but this replaces the toast class which has essential styles applied to it (from bootstrap styles).

Is the only way to copy all the styles attached to .toast into my own custom class?

[scttcper]

put 'yourclass ngx-toastr' for toastClass?

[scttcper]

i had success by being more specific with the classes. could also try !important.

.yourclass.toast-success {
  background-color: blue;
}