import ColorPicker
...
let vc = ColorPickerViewController()
vc.setDelegate(self)
present(vc, animated: true)

let vc = ColorPickerViewController()
var configuration = ColorPickerConfiguration.default
configuration.initialColor = .red
configuration.initialColorItems = [.init(id: UUID(), color: .red)]
vc.configuration = configuration
vc.setDelegate(self)
present(vc, animated: true)

extension ContentViewController: ColorPickerViewControllerDelegate {
    func colorPickerViewControllerDidFinish(_ viewController: ColorPickerViewController) {
        print(#function, viewController.selectedColor)
    }
    
    func colorPickerViewController(_ viewController: ColorPickerViewController, didSelect color: UIColor, continuously: Bool) {
        print(#function, color, continuously)
    }
}