User blog comment:Imhungry4444/Fairy Tail Wikia Podcast 9/14/13/@comment-7740542-20130915001224

i cant believe im going to go all nerd butt-hurt here, but Prime all Siths do in fact use red coloured lightsabres, because Siths use synthetic lightsabre crystals in the construction of their lightsabre which are only red opposed to the natural crystals found in the caves of Ilum which most jedis use when making their lightsabres.