I'm not sure what colors were offered but with pink a fusia (hot pink) bumble bee might look good IMO. It may not stand out as much compared to the black.
White may be nice too! Depends what other colors are on the car.
I got this from another site, not sure if it's correct, I don't see yellow
:
"The stock stripe for the R/T Challenger was the "bumble bee" stripe. This was painted on with acrylic enamel. This stripe was painted across the rear quarter panel and trunk. The big stripe was 5.25" and the thin one was .25". The gap between the two is 5/16 inch. You could get this stripe painted in White, Black, Bright Red, Bright Blue, and Green."