Close look at Blues In The Night. The base is black and the shimmer is ostensibly teal. But in certain lights and if you look close, it does flash purple at times. If you look at the other side of the picture, you can see where the purple shows up in the bottle.
Natural light, no flash.
Natural light, no flash
Bottle shot. The color-changing effect is way more obvious in the bottle (boo!). The shimmer closer to the neck is how it looks most of the time, but the purple and touch of gold at the bottom is what it looks like during those rare flashes.
Although I like this color, and had no issues with application, I was so mad! I hate when polishes don't live up to what you see in the bottle. Oh, the deception. ;_;