Blue! Aside from pinks, I love blue polishes. Color Club Over the Moon is an amazing budget friendly holographic (blue) polish. It also happens to match perfectly with my Tarina Tarantino Desert Skull Bracelet (which I love to death).
In the sunshine this polish is so intensely holographic, you can hardly believe it.
The other great thing about this polish is that it still looks beautiful even in the shade/not in direct light. I am hoping this polish will bring back the blue skies :)