UIView with gradient background in Swift

GradientView.swift

class OLGradientView: UIView {
    override class func layerClass() -> AnyClass {
        return CAGradientLayer.self
    }

    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        initGradientLayer()
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        initGradientLayer()
    }
    
    func initGradientLayer() {
        let middleColor = UIColor(red: 0.243, green: 0.251, blue: 0.259, alpha: 1)
        let outerColor = UIColor(red: 0.098, green: 0.122, blue: 0.133, alpha: 1)

        let gradientColors: [CGColor] = [outerColor.CGColor, middleColor.CGColor, outerColor.CGColor]
        let gradientLocations: [Float] = [0.0, 0.53, 0.93]
        
        let gradientLayer: CAGradientLayer = self.layer as CAGradientLayer
        gradientLayer.colors = gradientColors
        gradientLayer.locations = gradientLocations
        
        println(self.layer.backgroundColor)
    }
}