Convert a six-digit hex literal into a color

UIColorExtensions.swift

extension UIColor {
    convenience init(hex: UInt, alpha: CGFloat = 1.0) {
        let red = CGFloat((hex & 0xFF0000) >> 0x10) / 255.0
        let green = CGFloat((hex & 0x00FF00) >> 0x8) / 255.0
        let blue = CGFloat(hex & 0x0000FF) / 255.0
        self.init(red: red, green: green, blue: blue, alpha: alpha)
    }
}

Pretty straightforward:

let color = UIColor(hex: 0xEFEFEF, alpha: 0.6)