Nude is a family of neutrals, not a single colour that matches every hand. Decide whether you want a close visual match or a deliberate contrast with the skin.
Compare undertones
Place a beige, a rosy nude and a deeper brown reference beside the hand. Judge the options in the same light and check the product photographs for coverage.
Keep the finish separate
A nude colour may be opaque, sheer or shimmering. Choose the colour and finish as two separate decisions instead of assuming that nude means transparent.