Account based dyes not character based
I have the feeling that it is not the way you suggest OP because ANet wants to encourage people to buy dye packs from the TP and to encourage a healthy dye economy. Having said that though, I would love it if dyes were account bound as I don’t buy dyes and rely on what drops as loot.
After becoming invested in more than one ‘main’ character and loving the visuals of them all, it makes me very sad to see an essentially empty dye pane, recalling all the colors obtained on the first play through the game. I understand how a dye market is a factor, but I also really feel account-wide dyes would in general feel better.
Dye drops are essentially still random, and the BLTP sets are still pulling from the same colors a cook can make. Players who unlock a color on one character will never need to buy it again, so wouldn’t it not really count as a ‘market’? Isn’t it more of just keeping our ‘other’ characters caught up at a premium? It doesn’t give us an advantage or set of skills, as was said it’s strictly vanity. Most vanity items seem to be account bound, even if it takes a bit of effort to move them around. Why not the same for dye?
Possibly pay gems for an account-wide option? Or have a section of the pane for dyes marked for account-wide.
Having a guild-wide color section could be nice too, so guild members could color-coordinate. Which colors would be shared would be limited to just a few, maybe at a higher cost? Something the Guild can research?