Sometimes it's hard to find special polishes when the stores in your neck of the woods are polluted ... ehm ... Walmart.
Take Pure Ice - Heart Breaker ...
NYC - Empire State Blue
Here over Revlon - Modern Grace
It also has the blue green shimmer!
The base, however is more opaque blue.
NYC - Empire State Blue over Revlon - Modern Grace
Considering NYC is easily obtainable in CVS, Rite Aid and alike ~ $1-2... it's time to hoard.