How can I programmatically get the admin theme

Question

Similar question to How can I programmatically get the theme name? and How do I programmatically change the admin theme?.

I want to simply obtain the current admin theme machine name and human name, even when I might not be on a page where the admin theme is enabled as the active theme.

This information doesn't appear to be directly accessible via the ThemeManager class.

Answer 1

This is config and you can get it with the following snippet.

$admin_theme = \Drupal::config('system.theme')->get('admin');
$admin_theme_name = \Drupal::service('theme_handler')->getName($admin_theme);

Or with Drush:

drush cget system.theme admin