@ddljohn-- Congrats on your piercing!
I personally like the round studs, they look great. I have a friend who is very fair and she has black colored round studs. It looks amazing! For darker skin tones, I think silver toned round studs look better.
Basically, it looks good if you create a contrast between your skin tone and the color of the snakebite piercing. If you have other type or piercings, you could also pick something that matches the style and color of those.