从网上复制的十六进制颜色代码在swift中用作主要情节提要背景时看起来不同？

extension UIColor {
    convenience init(hex: String) {
        var hexFormatted: String = hex.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines).uppercased()

        if hexFormatted.hasPrefix("#") {
            hexFormatted = String(hexFormatted.dropFirst())
        }

        var rgbValue: UInt64 = 0
        Scanner(string: hexFormatted).scanHexInt64(&rgbValue)

        let red = CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0
        let green = CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0
        let blue = CGFloat(rgbValue & 0x0000FF) / 255.0

        self.init(red: red, green: green, blue: blue, alpha: 1.0)
    }
}

let hexColor = "#FF0000"
let color = UIColor(hex: hexColor)