This is a white label version of the default Joomla Administrator Template called Khepri with Joomla branding removed.

You may also want to edit the Help menu to change "Joomla! Help".

That's in
administrator/language/en-GB/en-GB.mod_menu.ini

The link to the help content can be customized:

1. The list of available help servers is stored in XML format in the file /administrator/help/helpsites-15.xml

2. Set the Help Server in

Site > Global Configuration [system]

Full tutorial on setting up a local help server:

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