Now I know why your user name is Rocket "Rich" :p
Seriously, though ... I think it has more to do with hook brand/style than with color. And I also don't think needle sharpness is necessarily needed on a fishing hook (for Crappie, that is) ... I've used rusted hooks, bent hooks, dull hooks, etc. and still stuck them in the fish. One would be surprised at how much psi force is generated on hookset ... even using 4lb test line and a UL. Couple that with, even a blunted hook, against the inside of a fish's mouth (let alone the soft tissue of the lips) and you would wonder why we don't always rip a hole in them :D
... cp