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[Warcraft] Green skin permanent?

How long is the green skin, caused by the blood curse going to last in the Orcs? Obviously while they were still cursed and subject to the Fel babies born would be green but what about now? If a baby orc is born now, with the curse broken, shouldn't they start to be born brown again? Maybe not this generation, but the next one, when their parents have had nothing to do with the curse or Fel?
gpt
Thrall's son Durak was born with green skin, and Thrall was born with green skin even though his parents had never tasted the demon blood - their tainted skin was indirect, and his was even more indirect.

So for him to have a green-skinned son with a brown-skinned mate in Aggra, it looks like the green skin is here to stay, at least for the forseeable future.  No orcs still have brown skin besides the group that stayed in Nagrand in Outland (aside from those on alternate-Draenor), so that trait is not likely to last long.