Seeing this question How do I get a Magenta Lightsaber Crystal?, I see that there are more lightsaber colors than I thought.
I know there are:
- Yellow + Dark center (preorder)
What else is there?
Green quality items. Requires low-level Artifice to craft (items at level 7 and above); found in standard weapons and as drops/rewards.
Blue quality items.
All the above
Orange (first drops are level 31; artifice-craftable beginning with level 47)
Purple quality items.
All the above (Orange level 50 schematics drop from the Primal Destroyer world boss on Belsavis)
Magenta, AKA "Light Red" (must be crafted)
White-Purple-Blue (added with Patch 3.0; not to be confused with White-Blue-Purple)
White-Yellow-Orange (added with Patch 3.0)
The PvE versions drop from Explosive Conflict, Terror from Beyond, and Scum and Villainy. They can be reverse engineered to learn the crafting schematic. The PvP versions come directly from the PvP Items vendor and cannot be learned via RE.
Cyan, AKA "Light Blue" (PvP schematic drops from Grade 6 PvP crafting boxes)
Purple (PvP schematic drops from Grade 6 PvP crafting boxes)
These crystals can be sold on the GTN or traded/mailed after a lockout period. There were no crystals in Shipment 4.
White (all packs except Black Market)
Pink-Purple (Black Market and Crime Lord's packs)
Cyan-Blue (Blockade Runner's pack)
Orange-Red (Skip Tracer's pack)
Lime-Green (Space Pirate's pack)
White-Black (all packs except Regulator's)
Derelict-Purple (Regulator's and Enforcer's packs)
Silver-Blue (Vice Commandant's pack)
Mint-Green (Archon's pack)
Copper (Supreme Mogul's pack)
Hot Orange (all packs except Contractor's)
Blood Red (Contractor's and Freelancer's packs)
Blue Core (Pursuer's pack)
Charred Orange (Tracker's pack)
Yellow Blue (Opportunist's pack)
Pink Magenta (Star Cluster Nightlife Pack)
Yellow Core (Club Vertica Nightlife Pack)
Gold Core (all packs except Builder's)
Blue Outline (Builder's and Gatekeeper's packs)
Pink Core (Constable's pack)
Sea Green (Seneschal's pack)
Purple Outline (Architect's Pack)
Black-Pink (all packs except Initiate's)
Purple-Black (Initiate's and Pilgrim's packs)
White-Blue-Purple (Acolyte's pack)
Pink-Red (Apprentice's pack)
Pink-Yellow (Master's pack)
Green Empeth (all packs except Core Worlds)
Blue-Cyan-Indigo (Core Worlds and Deep Core packs)
These are sold directly from the Cartel Market and do not appear in the gambling packs.
White (world boss drop during beta; sold on the fleets prior to Patch 1.2)
Black-Green (Rakghoul Outbreak and Rakghoul Resurgence event rewards)
Black-Silver Striated (Season 4 low-tier group and mid-tier solo Ranked PvP reward)
These are still in the game but can no longer be acquired if you don't have them already.
Black-Yellow (for pre-ordering the game)
Razer Black/Green (for buying a Razer SWTOR peripheral. This is a different color than the standard Black/Green; see this image)
Black-Purple Striated (March 2015 Subscriber reward)
Furious Red-Yellow (Season 3 reward, any rating)
Black-Blue Striated (Season 4 mid-tier reward)
These are part of the game assets but have not been made generally available.
Black-White (the inverse of White-Black)
PVP Rewards, insanely hard to get: