Dyes a pirate hat green - green that's more like a lime than envy, actually. Unless you're keeping that lime from your scurvy-ridden crew.

To use this hat dye on a pirate hat you must go to Smuggler's Rest and use Euphonia's Barter Box. Speak with Sailor Calatin in the Harbor during the Euphonia's Treasure Challenge event to get to Smuggler's Rest.