Picture. Yes.
The original hair color is on the left, dyed hair on the right:
As far as materials: If you can't find RIT dye, just drop a Playmo hair into a cup of boiling hot coffee (or tea.) Let the coffee cool to room temp, fish out your piece, rinse it off.
(If your piece should happen to come out too dark, rinse in VERY HOT water.)
The steps are almost the same with store-bought dye.
Small expense and learning curve: even the not-quite-right can give fun results. (I wanted the Victorian lady to have BROWN hair, but the tan is even more interesting.)
The Victorian Lady is fully playable. Hair pops on normally. The peaks of her white ruffle on her shoulder where the hair touches may darken eventually, but 4-5months in , it is still OK.
We will never store her in a drawer next to white plastic. That's her restriction.
The hair still looks like (IS!) Playmo plastic, not painted hair.
doug