I say you go with white ones. If your were doing the rear window louver then I'd say black. I think black 1/4 window louvers on your car wouldn't look right.
MODS: C&L Racer CAI,SCT Xcal II W/BamaChips Tune, Steeda UDP's, CMCV Deletes, Ultra Lite Springs, Pypes O/R H-Pipe, FRRP Stingers, 4.10 Gears, Shaftmaster 3.5" D/S, Rotorpros X Drilled/Slotted Rotors, BMR LCA's & Relo Brackets, Steeda Adj. Panhard & Panhard support, GMS Swaybar Delete & A-Arm Brace, Prothane Motor Mounts, 255/45/18 BF Goodrich KDW NT's, CDC Shaker Hood, Ducktail Spoiler, Classic Chin Spoiler, 1/4 Louvers and Lot's more Appearance Mods.