[hnlmorg]

Not in macOS Terminal specifically but one of my colleagues in a previous job used similar themes to differentiate between different servers. Database servers would be one theme, dev web servers another, and prod web servers a 3rd theme. It was a system that worked well for him but not something I've felt compelled to emulate.

[css]

I do this with git repos: backend repo code editor and associated ttys share one theme, frontend another, and so on. Makes it very easy to know the context of what I am working with at a glance.

[shiftpgdn]

That's remarkably clever. Many years ago I accidentally destroyed a production server when I got terminal windows mixed up.