     var heightConstraint: NSLayoutConstraint!
     var keyboardHeight:CGFloat = 400
     var buttonToFinger = [UIButton: Finger]()
+    var colorScheme = ColorScheme.rainbow
     
     // MARK: Keyboard states
     var shiftKeyActive = false {

        buttonToFinger[rightThumbFingerButton!] = Finger(side: .right, name: .thumb)
        
        updateKeyLabels()

        // Set up Settings Slide-in
        settingsOverlay.isHidden = true

    }
    
    @IBAction func touchUpFinger(_ sender: UIButton) {
        sender.backgroundColor = colorScheme.getDarkerColor(buttonToFinger[sender]!)
        fingersPressed.removeAll()
        shiftKeyActive = false
        updateKeyLabels()
