class func colorWithHexString(hex: String) ->UIColor {
var cString = hex.trimmingCharacters(in:CharacterSet.whitespacesAndNewlines).uppercased()
if (cString.hasPrefix("#")) {
cString = cString.substring(from: 1)
}
if (cString.count != 6){
return UIColor.red
}
let rString = cString.substring(to:2)
let otherString = cString.substring(from:2)
let gString = otherString.substring(to:2)
let bString = otherString.substring(from:2)
var r:CUnsignedInt = 0, g:CUnsignedInt = 0, b:CUnsignedInt = 0;
Scanner(string: rString).scanHexInt32(&r)
Scanner(string: gString).scanHexInt32(&g)
Scanner(string: bString).scanHexInt32(&b)
return UIColor(red: CGFloat(r) / 255.0, green: CGFloat(g) / 255.0, blue: CGFloat(b) / 255.0, alpha: CGFloat(1))
}