I KNOW that the post color doesn't matter to the fish, at least I believe that is the case and I'm sure there are more than a few folks fishing pink post "whatever's" that would catch as many or more fish than me on my appropriately colored post parachutes...
However, the post color of every parachute I tie & fish matches the natural. Based on where I fish that means most often the post is a shade of gray, tan or in the case of the parachute "Coffin Flies" I make, a mixture of white, black & light olive.
I also feel seeing my fly "on the water" is overrated. As someone who fishes a ton of really tiny flies, including stuff that is super small and totally black, the most important thing for ME is knowing where my fly landed and judging the current flow (though earlier observation) so I THINK I know where my fly is when I see a rise.
If all things line up, when I see that rise, I just tighten up and BINGO.