Aha! I knew I couldn't be the first person to complain about this:
https://www.mobileread.com/forums/sho...d.php?t=126296
There's a rather interesting discussion on that thread about the pitfalls of skinning a silver 350. One problem encountered by the two most active posters was their choice in skins: They picked designs with conspicuous color contrasts and continuous overall composition and so had to be especially careful to make buttons and such line up.
A repeated and blurred pattern of like colors would seem to me to be better suited for that -- one that complimented silver, ideally, in case any of it peeked through. On the Decal Girl site, I've been looking at black woodgrain, saddle leather and croc skin (matte), as well as dark burlwood, blue lacquer and green lacquer (glossy).
Haven't quite decided which would go best with the blue Sony case and 350's silver touches yet.