Refined pigment in Nightingale is needed to craft special items like ink and to dye your gear. However, you'll need the right Crafting Station and ingredients to make it. Here's how!

To craft Refined Pigment, you'll need a Simple Mortar Station. This is a Crafting Station that breaks down ingredients into powders and pastes. To build this station, however, you'll need the schematics, either by collecting them as a reward with Hope or by purchasing them from the Essence Trader for 55 Essence Dust.

Using the schematics you can build the Simple Mortar Station from the Build menu using the following materials:

You need wood to make the simple mortar station. This can only be obtained with the saw table (another scheme from the merchant).