int. color codes

i have a black 1990 vette with a saddle int. my problem is chevy books say saddle was not a color a black vette came with. i know 603 is the code for saddle but on the bottom line on the sticker on console door after the black paint code is 193 (black int)is this the int code ,if so why do ihave a saddle int, looks original whats up