Since the carpet doesn't match the curtains, I guess that means it's not her natural color.

Never play FFT:A?

comment #38203
It's established in the game that she has naturally white hair, and dyes it pink.

But in the FFT:A her hair really becomes pink when they're taken to the world of Final Fantasy...

I thought she left it white at the end of the game...

Yes, she stopped dying it after the end of the game. But you can see she wears her Final Fantasy armor, so I guess this is inside the FF world, before the game ends.
Oh, what the hell, I'm dessertating about a hentai image?