I'm as you know not that into pink but cerise hot pink combined with black is pretty cool. The KIKO polish I've used as a base has a purple/blue shimmer in it too which combined with the black pop out as purple and I like how inky the black look there. Other than that this is just a simple gradient. :)
Polishes used:
KIKO - 843, swatch here
ZTIZ (black polish)