Zoya Casey nail polish is beautifully dark nail polish. It has berry undertones, but as soon as you put on two coats it is an extremely dark almost black colour.
Zoya Casey (like all Zoya nail polishes I have tried) has a fantastic consistency, it goes on smoothly and streak free and you only need two coats to make it super-smooth and opaque. I have two coats of Zoya Casey nail polish on in the pic topped off with a layer of Seche Vite Dry Fast Top Coat.
See a list of all my dark nail polish reviews