What are the correct background colors

I've been working on the Property observer code and I can't seem to pass this task. I'm unable to test in the playgrounds as I'm pretty sure I've updated to swift 3 so compiler errors are called and the treehouse task causes no compiler errors

to summarise, help!?

Thanks!

Here's the question:

In the editor, I've created a UIViewController subclass, TemperatureController that contains a single property - temperature. Your task is to add a didSet property observer to temperature and set the view's background color depending on value of the temperature. For example, if the temperature is greater than 80, set the view's background color to UIColor.redColor(). Similarly if the temperature is less than 40, set it to blue color, otherwise set it to green color. Note: For changing the view's background color, there's example code in viewDidLoad()

class TemperatureController: UIViewController {
    var temperature: Double {
        didSet {
            if (self.temperature > 80) {
                view.backgroundColor = UIColor.redColor()
            } else if (self.temperature < 40 ){
                view.backgroundColor = UIColor.greenColor()
            } else {
                view.backgroundColor = UIColor.whiteColor()
            }
        }
    }

    init(temperature: Double) {
        self.temperature = temperature
        super.init()
    }

    override func viewDidLoad() {
        view.backgroundColor = UIColor.whiteColor()
    }
}