My base color is ILNP Night Light. "Night Light is a beautifully crisp deep blue-violet jelly loaded with holographic micro-flakes. This versatile holographic can be worn alone or paired with other shades for an incredibly unique custom shade!" (Source: ILNP) I used three coats and had no issued with application. Night Light is quite sheer, when I held my hands against the light, the nail line was still somewhat visible.
For the snowflake stamping (yes, there's a stamping, barely visible, though), I used aEngland Encore Margot and ÜberChic Beauty plate Christmas-01. One coat of KBShimmer Clearly On Top finished this mani.
ILNP polishes are available on Etsy and at their own shop.
aEngland polishes are available at various places, you'll find a complete list of retailers here.