Execute Emacs.app with command-line switches

[josherrickson]

Issue description

Is there a way to pass command-line switches if opening Emacs via Emacs.app instead of at the terminal?

E.g. emacs -bg '#17191a' launches GUI Emacs with that background color specified. I'd like to be able to launch from Emacs.app with the same option.

I have a work-around using Automator, but wonder if there's a direct solution.