I've only used white, and with all the fish I've caught using them, I don't think they seem to care too much. For me, the white really helps with seeing the fly, especially if you have to make a fairly long cast. I've seen the posts in all sorts of colors, so I would imagine that it really boils down to personal preference. Then again, someone with more experience using them may blow my theory out of the water, lol.

TT.