Using a Droid Customization Kit, you can change the color(s) of your droid. To accomplish this, you will need to pick up a Droid Customization Kit from a local engineer. Place the tool on your toolbar and call out your droid. Target the droid and use the tool, from your toolbar. This will bring up a window with a couple of options, depending on the droid. The following droids can not currently be customized through the use of a Droid Customization Kit - Protocol Droid and the Mk3 Mining Droid. The Protocol Droid does have an option to customize its color, during the crafting process.