jaykay, I think we have the same Boxster Red interior, which is a lighter red in comparison to the later 987 models with a much deeper red.
I'm not to sure about how stable the dye is - it certainly is dry to the touch and a towel with water. We'll have to see about shampoo.
Also, I did my door panels tonight. There's leather in these pictures, so you can gauge the match for yourself. The dye is spot-on Boxster Red leather - I accidentally got some on the leather door panel and couldn't even see it.
Outside today - engine cover done, door panels not done
Passenger door panel, pre-dye
Passenger door panel, post-dye