I know its not in the right topic but its the best I could do, hopefully admin will move. This is not an official voting system used by the NFC team and I'm not affiliated with them, the purpose is to make the picture accessible for everyone.
Colours are here:
Edit. Cant get enough options on the voting so if you want to, leave the the options listed below in a reply.
Also here is the pictures from the limited edition ring
Black Carbon is my choice at this time.
Black carbon here, ideally, i like the ring shown on the kickstarter page (:
i like a good green on black personally.