Narfell offers several possibilities for customizing the appearance of your character's gear.
Located in Peltarch's Commerce District, upstairs from Violleta's. Vanity Plates can be used to change the appearance or color of armor or cloaks, or change the color of helmets.
NWN color dye codes:
There also exists the facility to fully edit after character creation, (avoiding local overrides is best for characters (though not weapon)), by asking a DM to drop the "appearance changer" in the OOC server lobby.
It it possible to alter, Heads, height (+/- 10%), Body Type (weight), Tatoos, Hair and Skin Colour