go for white or pink. since thats your colors in your outift. or go with a pale pink so that you can wear it with anything really and it's not to attention taking to your nails instead of you.
Try black nail polish as a base with pink dots every other nail and white dots on the other nails.
Or mix the colors up (pink base, black and white dots etc...)
Maybe you don't like dots... try a stripe
Have fun with it! Solid colors on fingers can be boring when your outfit is fun!