Automator - Set Folder View Options in Mojave Dark Mode

You can change the view options of a folder with AppleScript (which you can use in Automator).

set theFolder to "iMac-FV:Users:frank:Desktop:aFolder"
tell application "Finder"
	open theFolder
	tell window 1
		set current view to icon view
	end tell
	close window 1
end tell

After that you can change the options of the view with the following script:

set theFolder to "iMac-FV:Users:frank:Desktop:aFolder"
tell application "Finder"
	open theFolder
	tell the icon view options of window 1
		set the icon size to 192    
	end tell
close window 1
end tell

Changing the icon size will only work in icon view.

If you want to set other options also you can add them to the “tell the icon view options of window 1” block.

How to sort:

set the arrangement to arranged by name

You can also change the Background color like:

set the background color to  {65535, 65535, 65535}

This is the code for Default in the Background section of the Folder info, if I look at the background color code of a newly created folder.

But if I set the background color to {65535, 65535, 65535} I get {65535, 65533, 65534} instead, this is the color code for a white background and this background stays white when you change to Dark Mode. Under High Sierra the background code is also set to {65535, 65533, 65534}.

So like you said Apple needs to fix Automator (and also AppleScript) for this.