Is it possible to dye our costume with White or Black?
How many different things can be dyed? Pets and carts too? In the early days of the free-2-play official Valkyrie Server (pre-renewal), there was a short time experiment with the 2nd floor Eden Kafra Cash Shop NPCs where you could purchase a special dye and then take that to the clothing dye NPC. You would then get a random clothing color. If you didn't like that color, you'd do it again. Various players took advantage which is why you still see in the game a sorta-violet biochemist last week or a white priestess or white high priestess approximately 3 weeks ago. Why bio, priest, or HP? Well, if they moved up to the next job class, they'd change their clothing for the new official clothing and need to have the new clothes re-dyed....
I suspect that some players only "look quickly in WoE for colors" as their way to identify character types, so if there was a wide variety of overlapping colors for all character types, it would be a lot harder to distinguish character job classes.
I can only dream of the day where the geneticist in his white-dyed disco-inspired clothing pulls his white-dyed cart followed by his mercenary (undyed) and the white-dyed Sera which is then followed by the white-dyed White Lady pet. That would be quite a wagon train of whiteness. Or maybe that player whose char is based upon the anime/book Kirito can finally dress his char in all-black clothing just as that crusaders inspired by Darth Sader would change the char's clothes and peco to be all black.