Blue Acid Dye

Blue Acid Dye is a dye that can be obtained in a set of 3 by giving a Strange Plant to the Dye Trader. When equipped in the dye slot, it will make the player's armor dark blue and create a waving effect.

Trivia
Blue acid dye is likely a reference to lysothergic acid (LSD), a hallucinogenic which creates effects similar to the dye's appearance.