We prefer the enhanced visual tracking of all three feathers the same color with matching Bohning Classic index nocks for cock position reference. Visual tracking is a key element in learning the trajectory off your bow and thereby creating a stronger mental picture for a more accurate instinctive shooting style. Many archers expect to see a different color cock feather and we certainly offer that as well. The use of index nocks reduces the need for an odd cock feather and I highly recommend taking advantage of this. Tracking a solid ball of color moving away from you is a wonderful marriage of function and pleasure. Index nocks also allow you to maintain focus downrange while loading an arrow on the string. The index is tall enough to feel through a gloved hand.
With colored feathers we like to match the nocks to them. With white fletching, white nocks really stand out, but black nocks look great with white feathers for a more "classic" look and there's no missing white feathers in flight.
On that note, the top choices for visibility are white, yellow, orange, and blue. While the other colors may be pleasing to your preference - particularly the earth tones (brown, leaf green, gray, black) - they can disappear in flight. So whether you're hunting, field shooting or target shooting, keep your environment in mind and choose appropriate fletching in contrast to the background of your perspective.