I tend to use proven color combinations like chartreuse and black, chartreuse and white, chartreuse and pink or chartreuse and orange. That will just about cover any water condition. I make sure the tail is not so long as the crappie cannot bite the metal hook and I usually tie with flat waxed red nylon thread to give a little gill simulation. Add some krystal flash to imitate scales and take along a boatload of confidence that what you have created is what the fish want to eat.