I think OPI Eurso Euro is one of my favorite blues that I use as a base for winter nail art. The white is contrasting so beautifully with this shade of blue! It’s also one of those blues that cover in one single coat. My bottle or Eurso Euro is a couple (or more?) years old and the polish has gotten quite thick. But it’s still manageable, and I still love this color for winter manicures. I think I’m going to continue using it this year :P
What’s your favorite blue polish?