Another thing to mess things up a bit:

The current hairspring in the Deepsea, Day-Date II, new Submariner is only called "Parachrome" and not "Parachrome bleu" anymore. I asked James D. about it who asked Rolex at Baselworld and they told him it was the same thing but it wasn´t called "bleu" anymore.

Maybe they have the same material in two different batches, one is blue and the other one isn´t? Would it be possible that Rolex made it blue (like blued screws or hands) in order to be able to have something "new" - not just an antimagnetic hairspring but a blue hairspring?

Looking forward to your clarifications John!
Nico