I think the way accessories are available to players is too random.
Its virtually impossible to find the right colored accessory. The auction house is a little useful in this regard, but its really not enough.
I suggest that:
1. Accesories can be crafted at alchemy machines
2. Recipies of Accesories should be available at random in clockwork terminals
3. Accessory Color change usables should be sold by strangers.
I have talked to a lot of knights in-game and they agree with me. I am sure that lot of players would love to see such a change
Being ableto craft them, would break their so called rarity and their prices wil surely drop a lot (unless they have ridiculous crafting costs to compensate)
I can agree with the part of recoloring them, but only using the 'regular' colors (no divine/volcanic/prismatic)