You are not supposed to dye pubic hair
why do you want to
unless you want to flaunt it all to everyone
Why would you want to anyway?
Leave it the colour it is. There is too much risk of getting infections and stuff.
In order to avoid skin irritation, apply petroleum jelly on the sensitive areas of your genitals. Do not apply petroleum jelly on pubic hair that needs to be dyed. Start applying the hair colour with the help of a brush. Cover all pubic hair and do not rub the hair colour mixture into your skin. Be sure that you do not allow any excess hair colour to seep into the sensitive area of your genitals. Leave hair mixture for 10-30 minutes. Wash off the hair colour mixture with the help of a hand held shower with warm water.
Wow. So much damn judgement here. Just because someone wants to dye their hair (any of it) doesn't mean they have insecurity in that area. And just because you won't be able to see the results on the street doesn't mean it isn't a worthy exercise in liberation from beauty standards and norms. Jeeze, y'all have no chill. The most recommended brand for this task is Betty Beauty, which has products specifically intended for it. Good luck and don't listen to the haters!