For the mouse? I think your best bets would be the white Zowie AM, EC1 Evo and EC2 Evo. Objectively, nothing matches them (I'm not sure about the "serious gamers" white Deathadder, but I don't think that's even an option anymore).
The keyboard's slightly harder. If you're in the US, then Rosewill do a white RK-9000 with either brown or blue switches. Thermaltake have a few white mechanical boards (all black switches, I think?), Filco have made white keyboards, though I don't know how easy they are to get ahold of and Matias have the Tactile Pro, though apparently you'll need a special driver to get the windows/alt keys working, since it's intended for Macs.
Headphones I'm not as well versed on, but I'm pretty sure there are white ATH-M50s, which beat every headset out there in terms of sound-quality.