Today I have an old favourite to show you, OPI's Give Me The Moon! Moon was released in a Night Brights collection, I say a few years ago, but I feel it was around 2007. This was also the collection that My Private Jet was released with.
I am wearing two coats here. You can see it is quite sheer. I think it would look amazing layered over a creme grey! That blue shimmer just shines. And it's very visible in all lighting situations.
I'm not sure if this is a part of OPI's main line of polishes, but it is certainly very easy to find online.