Shader

Shaders are items that change the color schemes of Guardian armor, provided that the armor can be recolored. Shaders can be purchased from several vendors in the Tower (though some shaders may be restricted to certain classes, require more Glimmer, Vanguard Marks, Crucible Marks, or have other requirements before players can purchase them), and each shader applies a particular color scheme.

Only one shader can be equipped at a time, and it affects all recolorable armor worn by the player. Certain items may be entirely recolored when a shader is equipped, while others may only be partially recolored or may not be affected by shaders at all.

This website provides a great way to view shaders on any Guardian.