Though I don't use it often, this color from their Halloween collection is a great blurple. It stayed on my nails 2 days with no chips with ory bonder and orly polish shield. I currently have it on my toenails over white in polka dots.

This is a gorgeous, jeweltone indigo with a shimmer, and it is truly "blurple" (blue-purple). In some light, it looks navy blue, and in others, it's distinctly purple. As I didn't have any blurples in my collection (purples and blues, but no in-betweens), this was a great addition. Formula is okay, pretty typical for China Glaze. It goes on streaky for the first coat, then evens out nicely on the second. Not terribly thin or too thick, and the viscosity is okay.This is very flattering to my pale, cool complexion, but it also worked well for my daughter, who has a fair-medium neutral-warm complexion. I like this one enough that I ordered a second bottle of it just in case this doesn't make it to the core collection.UPDATE: I have since learned that this polish is a dupe or near dupe for OPI Tomorrow Never Dies. It's also quite similar to (but not a true dupe of) OPI Ink. I haven't got TND or Ink, so I'm good with the Bizarre Blurple, but I thought I'd mention the similar polishes just to be complete.

From their 2012 Halloween Collection. Quite frankly, it's nothing special; the purple with blue shimmer polish has to be one of the most duped combos ever. (I think the second most duped purple polish is a purple base with fuchsia shimmer.) Application was a bit thick but it covered in two coats so that was a plus.