We need a way to preview all of the dyes
Agreed.
I made a thread with a similar suggestion here
https://forum-en.gw2archive.eu/forum/game/suggestions/Collectible-storage-for-Dyes/first#post217832
I like this idea quite a bit, it would really save some guess work. Although I am not certain I’d be willing to guess this shouldn’t be too hard to implement when they have some time. I am assuming though it would be an extra icon, a flag and maybe pagination but it could very well be something more complex requiring many hours of work, energy drinks and the film megaforce.