Bleach
Bleach is a quest reward item and behaves in a similar fashion as the mini-artifact Pigments of Tokuno and comes with 10 charges. However, instead of coloring an item it does the the reverse and removes hue from an item, returning it to it's default color. For example, barbed leather items become a plain leather color, valorite armor becomes iron armor color, etc.
Bleach may be obtained once per character by completing the Unfading Memories quest given by Emilio the Tortured Artist, located in the Artist's Guild in Britain.