Yes, you too can unlock a pink lightsaber, with no hacking, soldering, or programming required. Let me share with you my happy accident:
I had completely forgotten to change out my saber batteries before the first Galaxy’s Edge Lightsaber Meetup. My Arduino replacement blade had really drawn out a lot of power during testing, so I was near the end life of my batteries.
SURPRISE– if you have a purple crystal in your saber while your batteries are literally on the verge of death, you get a pink saber due to the lower voltage output.
Electricity is a weird, fun thing.