Experimented with colored feathers through the years and the highest visibility for my eyes are
chartreuse/florescent green with a florescent green nock, especially in low light.
Take, you favorite color and hot pink, white, and chartreuse fletching, and just at dark, shoot them in your yard just out of your low light sight. Notice which one look highest viz in flight, then walk over the direction of shooting and see which on your eyes picks up first in the grass. Chartreuse for me everytime.
Although only my number one arrow is fletched chartreuse, the others in the quiver are natural barred turkey with white nocks, because I've been busted by bright fletching the woods.
Say or think what you want, but from my experiences, all animals seem to pick up white or light bright colors with movement, where as you may get away with a little more movement with natural barred.