Secondary Medium Gray Dye Module
The Secondary Medium Gray Dye Module can be crafted by players who have the Artifice crew skill levelled to crafting level 40. Once you have reached Artifice level 40, the schematic for this dye can be purchased directly from the artifice crew skills trainer. This dye can also be bought from other players on the GTN, or crafted and then sold on the GTN.
When you use the Secondary Medium Gray Dye Module, it will dye the secondary dye section of your armor Medium Gray, and will leave the primary dye section of your armor its original color. You can not combine it with a different primary dye module.
All dye modules are one-use, so once you've added a Secondary Medium Gray Dye Module to your armor, you will not be able to remove it and reuse it later.