I wouldn't suggest it but you could probably use a shoe wax polish to change the color.
Maybe these will help
We painted ours with shoe polish. It was on a whim, but I know leather shoes need shoe polish so I tried it. We were thrilled with the results. The leather recliners look new! We started on scratched areas and ended up doing it all! No, it does not rub off if you let it dry before sitting on it again.