UIColorWell - iOS 14 - A control that displays a color picker.

UIColorWellSample.swift

import UIKit

class ViewController: UIViewController {

    var colorWell: UIColorWell!

    override func viewDidLoad() {
        super.viewDidLoad()
        addColorWell()
    }

    func addColorWell() {
        colorWell = UIColorWell(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
        self.view.addSubview(colorWell)
        colorWell.center = view.center
        colorWell.title = "Select Color"
        colorWell.addTarget(self, action: #selector(colorWellChanged(_:)), for: .valueChanged)
    }

    @objc func colorWellChanged(_ sender: Any) {
        self.view.backgroundColor = colorWell.selectedColor
    }
}

I get this error message...
Argument of '#selector' does not refer to an '@objc' method, property, or initializer
I have already marked the function with @objc attribute.