Customized locked out screen?

Is there anyway to customize the locked out screen dialog? My regulatory org wants me to add contact info of the administrator to the locked out dialog to help blocked users.

You can override most of the dialog text shown in the widget by using the i18n config object. In this case, I was able to find the matching text in the login.properties file and modify it by setting up my widget config as below:

var config = {
  baseUrl: OKTA_DOMAIN,
  i18n: {
    en: {
      'error.auth.lockedOut': "You're locked out. Please email IT for assistance."
    }
  }
}

Note that this will only be possible if you have a custom URL domain configured for your org (and can edit the Custom Sign In Page) or if you are self hosting the widget.