It wasn't until about three seconds after I dropped the yarn in the pot of dye that I remembered Samurai Knitter's experience with purples. It seems I am now left with something that looks somewhere between magenta and violet, though I'll probably have a better idea once it's dry. At the moment though, the only word I can think to describe it is "ultraviolet".
Thankfully, it was only a small hank of some of my handspun that I was using for an experiment (do two different colors of undyed fiber come out the same color?) , but I think the addition of a dye that is notorious for breaking down and making crazy colors might just affect my results. Ah well.