“Wait…. Then again, something that is not generally accepted and/or be considered trendy in the non-Jewish world, like black nail polish, wouldn’t be permissible.” 🙂
I think that much as people don’t like admitting it, different types of styles have different meanings. Like, wearing jeans sends a different message than a suit does.
Black nail polish is not pretty. The point of black nail polish is to send a message. When I see black nail polish, I think it says “anti-establishment” or something like that. It’s not just that it stands out; it has no purpose other than standing out.
That being said, if I were teaching teen-age girls who were having a hard time with tznius, I probably wouldn’t say anything about black nailpolish. I certainly would not put it in the same category as short or tight skirts.