I agree with a curly q. I have never had problems with the permanent dye penetrating my hair, as long as my hair isn't wet. Washing/conditioning, etc. the day before makes no difference at all.

Permanent dye is quite strong!

Let us know if you have a problem, but I would be very surprised if you do, as long as the dye is permanent.
2/c and some 3A.
Protein sensitive but can use occasionally
Highly porous. Color over grey.
Best 1st day method: Super Soaker
Stylers: Mix Curls in a Bottle into everything for shine. Terrible pj
Sometimes try roller sets - classic glamor but I prefer my curls.
Every day is a gift