“apushatayid – i was referring to the ones that are permanent the ones that dont come out just from washing it like 5 times.”
Many OTC coloring treatments last several weeks, or more. Having asked the shayla on behalf of my wife, I can say that as far as a chatzitza is concerned, “it depends”, ask a shayla. If you are asking about the hashkafa of doing so I dont think I have much to add to whats been said.