I went purple for my violet nails. ;-) I did CG Coconut Kiss base. Then I used blue painter's tape cut into thin strips & taped off the bottom 1/2 of each nail... diagonally. On the tips, I added CG Fairy Dust for a pretty, holographic sparkle! :)
Here's what I used:
base color: China Glaze Coconut Kiss
glitter: China Glaze Fairy Dust