JediRevan001, it was purple during the Jedi Civil Wars as of the ToR Time Line Videos. And my personal opinion, it was a bad move on Bioware/EA/LA part to include Revan and Jedi Exile within ToR. That is for another thread.
As for the lightsaber hilt, 2 long lightsabers, 2 Shoto(short lightsabers), 1 Double Lightsaber verison. And able to change out the color. Mainly to adjust to the player's personal choice.
Sidenote: I would love to see a Jolee's Double Lightsaber.