The colours of lightsabers has resulted in many extremely heated discussions between Star Wars fans of all ages.
There's basically two factions:
1. The colour of the lightsaber depends on the type of force user.
2. The colour of the lightsaber depends on the type of crystal.
Before George sold his company to Disney, the second theory seemed to be the one most supported among the hardcore fans (might have something to do with specific scenes, official art, lore and remarks from GL at that time). However, the status of sabercolour is unknown in Disney Wars. Disney basically called everything outside the original trilogy and the pre-quel trilogy non-canon. But, ask the avarage Star Wars fan, and they'll tell you that everything released since Disney can't be considered canon, including Disney's de-canonizing statement. And although Disney seems to have the regal rights to Star Wars, Star Wars fans are the ones who get to decide whether they'll spend money on Star Wars or not. So who ends up having the longest breath? Will Star Wars fans ever acknowledge Disney as the authority on Star Wars, or will Disney give in and return Star Wars to its original state or possibly even sell the franchise at a loss?
Am I rambling?