A good purple to use could be
'Done out in Deco' by OPI
If you cant find a nice periwinkle
White - Sally Hansen
Black - Art Club - has thin brush
I love that stuff
Then I jazzed it up with purple
Ways to use a plain ole' pen for nail art !
1. Use it as a Nail Dotting Toll
2. Use it to pick up Rhinestones
3. Use it to paint various shapes on nails.