Swift any string to HEX color string

color.swift

import Foundation

func stringColorCode(_ s: String?) -> String {
    guard let IDString = s else {
        return "000000"
    }
    let hashInt = IDString.hashValue
    let c = hashInt & 0xFFFFFF
    let hexString = String(format:"%06x", c)
    return hexString.suffix(6).uppercased()
}

print(stringColorCode(nil))
print(stringColorCode("a"))