It has been a while since I have played this game so I don't remember how to find color crystals but I do remeber that back when I played this game all the time my lightsaber usually came out orange or at least I had an orange crystal. I looked through my inventory and did not see a green crystal in it so is the color you get when you make your first lightsber random? I tried it a second time and it still came out green.
I went to Bao-Dur and made it but it came out green. So I'm currently playing KOTOR 2 and I have just aquired all the parts to construct my lightsaber.