Get red/blue/green from SwiftUI Color

Color+Extensions.swift

extension UIColor {
    // default implementaion of hex parsing
    public convenience init?(hex: String) {
        let r, g, b, a: CGFloat

        if hex.hasPrefix("#") {
            let start = hex.index(hex.startIndex, offsetBy: 1)
            let hexColor = String(hex[start...])

            if hexColor.count == 8 {
                let scanner = Scanner(string: hexColor)
                var hexNumber: UInt64 = 0

                if scanner.scanHexInt64(&hexNumber) {
                    r = CGFloat((hexNumber & 0xff000000) >> 24) / 255
                    g = CGFloat((hexNumber & 0x00ff0000) >> 16) / 255
                    b = CGFloat((hexNumber & 0x0000ff00) >> 8) / 255
                    a = CGFloat(hexNumber & 0x000000ff) / 255

                    self.init(red: r, green: g, blue: b, alpha: a)
                    return
                }
            }
        }

        return nil
    }
}

extension Color {
    
    var uiColor: UIColor? {
        switch self {
        case .black: return .black
        case .white: return .white
        case .clear: return .clear
        case .blue: return .blue
        case .yellow: return .yellow
        case .gray: return .gray
        case .green: return .green
        case .pink: return .systemPink
        case .secondary: return .secondarySystemFill
        case .orange: return .orange
        case .purple: return .purple
        case .red: return .red
        default:
            // Description returns hex representation of color if color is custom
            return UIColor(hex: self.description)
        }
    }
}