go with red it is a very classy flattering color for toes and it goes with leopard print.
I think it depends on the colour show you are planning to wear. If you are planning on wearing a coloured show I think you should wear black nail polish but If you are planning on wearing black shoes you should either wear a leapord print tape nails (easy to get in shops) or the same orangy/yellow that would be on your dress. Hope this helped!
Green like this could be nice
Black or navy blue.
whity.....................it looks charming
Black.