What is your hostname when you open a terminal?
toilet was my first server (because it served files), then I upgraded to gram (because it served web pages, too), and they connect to dishwasher (because it's the router).[0][1]
[0] https://wiki.loadingreadyrun.com/index.php/Installation_Anxi...
To answer your question, my daily driver prompt is "r-w@earth".
$
or when root:
#
Its color changes based on the return status of the prev command.
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Same on servers, but with their name. e.g. my primary on Vultr is
vum $