[Fiddler] Sessions coloring

customrules.js

// ...
    static function OnBeforeRequest(oSession: Session) {
        // ...
        var clientColors = ["red", "blue", "green", "gold", "orange", "purple"];
        var clientId = oSession.oRequest.headers["User-Agent"] + oSession.oRequest.headers["Authorization"];
        oSession["ui-color"] = clientColors[Math.abs(clientId.GetHashCode()) % clientColors.length];
        // ...
    }
// ...