Best colors I have used by lure company below:
Megabass 110+1: elegy bone, ghost pro blue, ghost shad
McStick: table rock shad,,ghost table rock shad, normal flake, ghost norman flake
6th Sense Provoke: ozark juice, threadfin flash, spanish bone
Doty SS: any color--varies on the day which they prefer
I don't think you need just dark colors at all (sure, certain days dark is better). Those look like food, that's all that matters.