What is what nail color is most attractive to guys?

As an AI language model, I do not have personal preferences or feelings. However, studies suggest that men tend to be attracted to bright and bold shades of nail polish, such as red, deep purple, and dark blue. Neutral colors like nude, beige, and pale pink are also popular options. Ultimately, the choice of nail polish color comes down to personal preference and how confident and comfortable it makes you feel.