The original is very low in contrast but please give it a go yourself as I said I was actually trying to do something else and it just suddenly started looking like Yoda (of all people).
It would be funny if a colour change could rescue the ugliest puppet in the Star Wars universe.
++UPDATE++
I'm beginning to think this looks more Yodaish because the contrast is too high (it's making those awful eyes actually look dark like the Yoda of old).