Black Dye is a dye created from Black Ink and is used in many other dye combinations. Black Dye is an item that can be placed in the Dye Slots of a player's Inventory to alter the colors of worn Armor or Vanity Items. Dyes and Dye Slots were introduced in the 1.2 update. This dye is also an ingredient in some advanced dyes.
When this Dye is mixed with other colors and when the character is lit up by a Shadow Orb it causes the Armor to color black.