Hmmm, I thought black with chrome exhaust was available for 2013 and 2014. I thought there were 6 different F6B color combos, 4 of which were single year versions. Black and matte silver were the only ones available for more than one model year.
2013: Black/chrome, Red/chrome
2014: Black/chrome, Yellow/chrome
2015: Matte silver/black, Blue/black
2016: Matte silver/black, matte white/black
In the wild I think I've seen more black/chrome than any other color. Black/chrome was my first choice but I got impatient and settled for a fast red.