I guess I'm just of a different mindset than some guys, probably most. I look at it this way. I am using a Fletcher Hunter Mag (1/4"). It's black, but I never have trouble seeing it because I don't see it. I see through it. I shoot maybe 10,000 shots a year so my form is pretty consistent. I use slightly smaller peeps on my target and 3D bows, but my anchor points are the same so it doesn't matter.

Hunting is a different thing than target shooting, but if a person shoots enough form will be the same. In this case you do not have to SEE your peep. You see through it. And for me anything that distracts my eye from my intended target is just that---a distraction.