It's not the color, it's how you use it...

This actually looks to be more of an electrified or force-influenced vibrosword...and the guy wielding it appears to be either a Bounty Hunter or Agent. I know we've had talk of an electric, one-time use vibrosword for Agents. And not that the Clone Wars has any influence on TOR...but I would love to see Bounty Hunters able to use swords like this to take on Jedi / Consulars.

I think in the episode though, he mentioned something about it belonging to a jedi or sith. can't quite remember it was a long long time ago. I'm reminded of the old tales of the jedi early sith era comics from dark horse. In the one's dates c. 5000 BBY, the sith actually were wielding what looked to be swords infused with some kind of energy (presumably the force), while the jedi used lightsabers, though they were connected via wire to a power pack on their hip. This reminded me of a sith sword, only more katana shaped. Also there's the obvious flaw that the guy wielding it in the episode didn't have the force...

The Black saber was in the first The Force Unleashed game. It was given as an end game bonus. The problem with having a black saber is it's so hard to see in places with darker lighting. In the case of TFU they had a white glow around the black.