The red nail polish that Gertrude (Janet McTeer) applies on her fingernails and on Daphne’s toenails is Divinora by Guerlain.

This is a historically inaccurate choice (the film is set in the 1940s, while the Divinora make-up line was launched in 1990s), but I understand why the film’s prop masters made it: there’s a certain vintage feel to this bottle that makes it realistic in a 1940s context.