Black and Medium Blue Dye Module
The Black and Medium Blue Dye Module can earned through the Reputation system, by reaching the Champion rank with Rishi. Once you have reached Champion, you can buy the schematic for this dye from the Rishi vendor for 100,000 Credits. The schematic, once learned, allows you to craft Black and Medium Blue Dye Modules with Artifice level 500. If you have not reached Champion with Rishi, or do not have the Artifice crew skill, you can buy this dye from the GTN from other players.
When you use the Black and Medium Blue Dye Module, it will dye the primary dye section of your armor Black, and the secondary part of your armor Medium Blue.
All dye modules are one-use, so once you've added a Black and Medium Blue Dye Module to your armor, you will not be able to remove it and reuse it later.