You could ask ten different pros and get ten different answers. Most of it is based on personal experience and the fish in every body of water are different. However, since you do say that the water is generally murky, your best bet would be a darker color: Junebug, black, Tequila Sunrise, and so on. If those fail to produce try something different that the fish may not be used to, say maybe pink or yellow.

everybody has there own idea

i would use like junebug watermellon red flake or tequila sunrise

but definintly dark

In my experience, color matters more to the fisherman than the fish (to an extent). Everyone has a preferred color and that color generates confidence and belief in your presentation. When you believe in what you are doing and the lure you are using, you will be more diligent and patient working the lure and covering water. For the record, my favorite is basic purple.