What are the must have nail varnish colours?

I don't think you need any more, but maybe you might want white as it looks chic on your nails after you seal it with a top coat. I don't know if you need a base coat on your nails....If you want to paint your nails do it in 3 stripes: 1 going vertically on the middle, and the other 2 on the sides. To even the color out you apply a top coat.