Pink is mainly a bright color like flourescent colors or bright white. In crystal clear water pink looks pink, but how many waters you fish that are crystal clear?
I'm not a color diehard but do have a few confidence colors - very few that are very bright. Color emphasizes lure shape and action whcih are primary strike triggers. Strike triggers, in general, provoke fish either via irritation or a hightened nervous-level. A bright color may do just that - irritate the crape out of crappie with hue secondary.
Nimrod's example says best:
Colors are most important to fishermen. Years ago, I used some pink and white tube jigs with insert heads. Caught plenty just like every other color I tried.
Below are a pink Trick Worm and a pink/chartreuse C. Magnet. Both caught many fish on many outings. Another was a hybrid that combined a pink grub body and pink paddle tail together.