Have we yet determined the details of how a dye affects the material when used in the outfit system? We know from the existing use with costumes that different materials are affected differently by dyes, but I haven't seen the gory detail anywhere. It's not just a hue replacement, or the black/white dyes wouldn't do anything. There must be a chroma effect, and a lightness one. I've seen changes to gloss/specularity as well. Do all dyes work the same way, or do higher tiers affect more? E.g. there are multiple blacks, and some seem to affect gloss.
One of my characters would like to wield golden axes, and knowing the "how" would cut down a lot of trial-and-error time at the Outfit Station.