The Outfits are probaly the hardest part to get right
The Outits in order to be approved has to be movie Accurate and that changes with every new thing intrduced
For Sith, they need to be either black, grey, or red altthough they can have a bit of purple
A lot of the Outfits have to be accurate to the movies
The Sith Outfits do have to kind of look alike so they fit
If you want to go for a Movie Character you would have to go through a lot more
You could also do a Dark Jedi like Anakin was before He became Vader