Swift Access Objects In View Controller From Window Controller - swift

Question

I'm just getting into development on mac os and I made a simple app for the touch bar that allows you to change the color (with a nscolorpicker) of a label that is also on the touch bar.
Now I would like to get the same effect on the actual window like so: I change the color using the picker on the touch bar and the color of the colorwell in the window changes as well.
This is the code that I currently have for the touch bar actions:
import Cocoa
#available(OSX 10.12.2, *)
class MainWindowController: NSWindowController {
#IBOutlet weak var cptHello: NSColorPickerTouchBarItem!
#IBOutlet var lblHello: NSTextField!
override func windowDidLoad() {
super.windowDidLoad()
// Implement this method to handle any initialization after your window controller's window has been loaded from its nib file.
cptHello.color = NSColor.white
setCol()
}
func setCol(){
lblHello.textColor = cptHello.color
}
#IBAction func colorPicked(_ sender: Any) {
setCol()
}
}
This piece of code resides in MainWindowController.swift which is paired with the window controller.
In the view controller, I have a single NSColorWell that I would like to change the color for inside the function "setCol()". I created an outlet in the view controller for it like so:
#IBOutlet var cwHello: NSColorWell!
So ideally what I want to achieve is something like this:
func setCol(){
lblHello.textColor = cptHello.color
ViewController.cwHello.color = cptHello.color
}
Can this be done at all?