Actually, I like the violet lightsaber. I'm tired of the fact the all Jedis have either blue or green sabers and all Sith have red. Knights of the Old Republic suggested that the color was part of a whole branch of service thing, which was really just a gaming thing. According to EU, the color of the saber depends on the crystals used in it. Hence why Corran Horn's saber is silver(which is a color that was finally added to KotOR II

). I remember Jackson saying he wanted it because it would allow him to pick himself out in the crowd fight scenes. For, I believe, the MTV Movie Awards, he gloated saying, "I'm the only one with a purple lightsaber, and only I know what it means". ^_^ Know if only we could get a Sith with a different color blade outside of the Dark Jedi in KotOR.