The B+W booklet shows a 040 as yellow-orange and 041 as red-orange.
Estimating by the way their catalog numbers run, the 042 is definitely a black and white filter. 0xx is the only series listed as for black & white.
B+W will sometimes drop numbers from the catalog I suppose from lack of customer demand, especially when the differences are slight.
If you wish to call, Schneider technicians have older references on hand and have helped me out from time to time finding older numbers,

Color correction filters are either KR or KB. KR=red, KB=blue