Primary Medium Gray Dye Module
The Primary Medium Gray Dye Module can be crafted by players who have the Artifice crew skill levelled to crafting level 120. Once you have reached Artifice level 120, 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 Primary Medium Gray Dye Module, it will dye the primary dye section of your armor Medium Gray, and will leave the secondary dye section of your armor its original color. You can not combine it with a different secondary dye module.
All dye modules are one-use, so once you've added a Primary Medium Gray Dye Module to your armor, you will not be able to remove it and reuse it later.