I am pretty sure the black spokes craze started beginning with 1998. The Crossmax look was very in those days. I can vividly remember STX-RC equipped Scott hardtails with full black wheels and IRC Mythos tyres in rustwall trim. Quite the eyecatchers! I am pretty sure 1997 was still a "normal" year. I devoured magazines regularly and can't remember standard black spokes before 1998. I'd go for silver ones if I was you.
1990 GT Karakoram 20" Purple Haze (urban project); 1993 GT Karakoram 20" Ferrari Red (classy beater); 1993 GT Karakoram 14.5" Black Light (almost original); 1994 Breezer Jet Stream 18" (unlikely story); 1995 Winora full suspension (a fine riding mistery); 1997 Kona A'Ha (anniversary edition); 1997 GT Arrowhead 18" (poisoned gift); 1998 Stevens 6.1.2 (true warrior); 1998 GT Moto cruiser (just google it!); 1999 Santa Cruz Chameleon (the heartbreaker revived); 1999 GT Lobo 1000 (retired with works Super T); 2000 GT Lobo (turns original); 2001 Klein Attitude Comp 19" (ultralight project); 2001 Cannondale Jekyll 1000 SL (better that a lot of "fresh" bikes); 2003 Intense Tazer (close to factory team spec); 2003 Intense M1 (old dream on hold); 2007 Crupi Pro XXL (pumptrack teacher)