From now until midnight PST on Sunday, January 26, GW2 fans have a great opportunity to get the retired Toxic, Flame, and Frost Dye Packs, in the Gem Store. Each pack contains one themed dye.
Pick up a Frost Dye Pack for glacial blues and wintry teals, a Flame Dye Pack for ashen greys and fiery reds, and the Toxic Dye Pack for eerie purples and vivid greens. Act quickly: these packs cost just 125 gems apiece or 500 for five, and they’re only available through Sunday!
Source: GW2 Official Site