Dye soulbound
Question is, are you going to use 400+ dyes on that one character? Especially on all characters? Probably not.
Each character will probably have a theme. For instance, whenever I find pinks or purples, I use them on my Mesmer. If I find greens or browns, I use them on my Ranger. I won’t ever use greens and browns on my Mesmer cause it just doesn’t suit them (in my opinion). So it wouldn’t make much sense to have those colors in the first place on them.
There is currently(?) no achievement for having every dye in the game, so there is no worry to make sure you collect them all. Just get the colors that suit your character. And dyes are pretty cheap at the moment as well, so if you want say Red on every character, it won’t cost you much.
Lady Bethany Of Noh – Chronomancer – Lords of Noh [LoN]
Just do it like i do: Use the dyes that you find while playing
I like soulbound dyes. Adds more progress-personalization to secondary characters.
When things are a major chore I often prefer it to be account bound rather than character bound, but I do not find collecting dyes to be a major chore.