If you're interested in what colors you can make, with varying degrees of strength, I would advise getting a RGB module, and then using something like
this to determine your color that you're aiming for and the values to program them on the SD card. Now, I haven't played in depth with the NBv2's settings, so I'm not entirely sure how easy that is to do, but. You would have, in one way, a setup very similar to the Emerald board, color changing your saber by simply adjusting the LED output settings in the config. I'm pretty sure that can be done along with the flicker/etc, but.... as in all things, I could be wrong, and the NBv2 may not be capable of such settings.
In which case, I would totally advise getting a higher tier board. lol