I dunno, I fished with an Orvis Mid Arbor reel in Titanium for years and didn't notice that I couldn't catch fish because of the color.
I have a Super 4 in Platinum and am happy with it. It's a great match for my 590. If you like a natural aluminum color or a close match to a nickel reel seat, Platinum is a good option. I saw a Pewter in person once, it has a slight blue tinge to it which looked nice as well. If you are looking for more of a stealth approach, you can't go wrong with Abel's black options either though. Matte or Black, both beautiful.
Don't get me started on the HD Brown, Brook, Von Behr, etc finishes.
Here's the now retired Orvis: