I don't think it does, although it seems as though most of the sith have had it. If I recall correctly, it's the hue used by them because it is a synthetic Kiber crystal vs. a regular nature made one in the the Star Wars world, and they have the means and access to making it. Or something like that IIRC. Ren's jagged edged version with the bottom flares is because his Kiber Crystal used is a cracked one from what I recall reading. Probably on Wookiepedia.