Yes. It wasn't until Revan, that the Sith went to the standard red lightsaber.
Warb Null carried a viridian saber before he was destroyed.
Tulak Hrod carried a violet lightsaber.
Ajunta Pall and Ludo Kresh didn't even carry lightsabers. They carried double blades. Think saber-staff but these were made out of a metal that could stand up to a lightsaber.