I bought (on-line) a bottle of Pelikan 4001 Royal Blue last month but the seller contacted me after a couple of days apologising for an inventory mistake: they were fresh out of Royal Blue. He offered me Blue-Black, but I don't like blue-blacks, so we settled on a bottle of 4001 Turquoise. Also, he sent me a 62.5 ml bottle of 4001 Brilliant Brown as ways of compensation, which I think was nice. Before these bottles arrived, I kept thinking "OK, I can work with the turquoise... but what am I gonna do with brown ink!?" Well... after I inked pens with both and wrote some, I'm seeing this as the Brilliant Brown being the replacement for the Blue-Black with the Turquoise bottle as compensation! I guess I'm a fan of brown inks now.