AMColorPicker can select color by three ways

class ViewController: UIViewController, AMColorPickerDelegate

func colorPicker(_ colorPicker: AMColorPicker, didSelect color: UIColor) {    
    // use selected color here
}

let colorPickerViewController = AMColorPickerViewController()
colorPickerViewController.selectedColor = .red
colorPickerViewController.delegate = self
present(colorPickerViewController, animated: true, completion: nil)

public var selectedColor: UIColor = .white
public var isCloseButtonShown: Bool = true
public var isSelectedColorShown: Bool = true

pod 'AMColorPicker'

github "adventam10/AMColorPicker"