Not at all emo and if you want to make sure, paint your ring finger a different color to accent. All black with a silver nail is very pretty or you could go a step further and put a bit of a design on the one nail. Make it white with black dots (easily created with a toothpick)
I love wearing black, ever since I saw Audrey Hepburn movies. Black nails can be very stylish. I can't upload this pic I have, but you should search on Google or Pinterest Sophisticated black nails, there are some nice ones.