I just got back from visiting family in West Virginia. The drive there is absolutely beautiful, and is what inspired this nail design. It is supposed to look like the blue mountains against the sky.
Base is Treasures of the Sea Crushed Pearl, light blue is Zoya Yummy, and dark blue is Sally Hansen Grey by Grey.
I like the effect I got, not sure it looks like mountains without me planting the idea in your head, but it is still pretty.