Color Club Over the Moon is a moderately cool-toned, medium blue with a holographic finish. It is a permanent nail lacquer.
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Color Club Over the Moon Nail Lacquer ($10.00 for 0.50 fl. oz.) is brightened, medium blue with holographic shimmer. Milani Cyberspace was the closest shade I could think of, as it does have holographic shimmer and is blue, but it's a darker, almost grayish blue in comparison--and has a larger sparkle/shimmer finish overall.
Looking for something similar or to see what you have in your stash? Here are some of the top dupes for this product!