For the record, the "approved by me" Sith blade colors are Blazing Red, Fire Orange, Pyrestone Orange, and Hot Pink. Bane's Heart is currently going through a probationary period as well.
For me, I'd add Violet Amethyst to that list as well. Any color that has close to 50% Red can be a Sith color.
After all, Darth Revan used a Purple blade along with his Red one.
Any color with about 50% Blue or Green is a Jedi color.
GB, AB, CG, SRD, SY (SY has way more Green than Red) & BVA
Violet Amethyst is, at least in my opinion, the only color that comfortably fits both Jedi or Sith aesthetics.
-