How long after you color your hair should you wait before coloring it again?

You should wait at least 6 weeks that way you wont damage your hair. Coloring it too soon can lead to discoloration, breakage, and dryness of the hair.

however long it takes for the original color to show through the new color then re color it

6 weeks unless you want it dry and fried

you should wait at least six months i think

2 months

i think its something like 3 months (it might say in the dying instructions)

If you get it done by professionals, it can be colored the same day. Thing is, if they are going over a color that you are trying to change, they are more than likely just using a rinse. Make sure that you properly condition your hair if you are going to do it yourself. And if you are doing it yourself, I would make sure to wait at least two weeks.

3 weeks earliest... 1 month is usually best