I recommend clear nails.

I bought this budget-friendly nail polish at Daiso for 1,000 won. Honestly, I initially bought it thinking it was an opaque skin-tone polish, but when I got home, I realized it was a very light pink... It's not colorless, but it's practically transparent. I don't usually get manicures or pedicures, but since more skin is exposed in the summer, I've generally preferred colors similar to my skin tone. I think a "barely-there" look like this isn't bad at all. If applied lightly, it's such a light shade that you could even use it as a top coat over another nail color. If you want a slightly darker look, I think you can achieve the opaque nude tone I originally envisioned by layering it several times while letting thin layers dry. I recommend it!