article-programmaticalstyling1.swift

let backgroundColor = UIColor {
    $0.userInterfaceStyle == .dark ?
        UIColor(red: 10.0 / 255, green: 40.0 / 255, blue: 58.0 / 255, alpha: 1) :
        UIColor(red: 183.0 / 255, green: 228.0 / 255, blue: 255.0 / 255, alpha: 1)
}

// Or in short:
let borderColour = UIColor {
    $0.userInterfaceStyle == .dark ?
        UIColor(red: 197.0 / 255, green: 197.0 / 255, blue: 197.0 / 255, alpha: 1) :
        UIColor(red: 0, green: 27.0 / 255, blue: 67.0 / 255, alpha: 1)
}