Blue Crafters' Scrip
Blue Crafters' Scrip was a type of Scrip currency paid to Disciples of the Hand by Rowena's House of Splendors in exchange for services rendered. It was spent in the Scrip Exchange NPC to buy many sorts of crafting-related items and gear.
As of patch 4.0 this currency was discontinued. Any currently owned Blue Scrip could be exchanged for Red Scrip at the Scrip Exchange NPC until patch 5.0.