Color+fromHexString.swift

import SwiftUI

extension Color {
    public static func fromHexString (_ hex: String) -> Color {
        let hexString = prepareHexString(hex)
        guard hexString.count == 6 else { return Color.gray }
        return Color(makeUIColorFromRgbValue(makeHexInteger(hexString)))
    }
    
    private static func prepareHexString(_ hexString: String) -> String {
        var preparedHexString = hexString.trimmingCharacters(in: .whitespacesAndNewlines).uppercased()
        if (preparedHexString.hasPrefix("#")) {
            preparedHexString.remove(at: preparedHexString.startIndex)
        }
        return preparedHexString
    }
    
    private static func makeHexInteger(_ hexString: String) -> UInt64 {
        var rgbValue: UInt64 = 0
        Scanner(string: hexString).scanHexInt64(&rgbValue)
        return rgbValue
    }
    
    private static func makeUIColorFromRgbValue(_ rgbValue: UInt64) -> UIColor {
        UIColor(
            red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,
            green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,
            blue: CGFloat(rgbValue & 0x0000FF) / 255.0,
            alpha: CGFloat(1.0))
    }
}