If you're fishing water that's stained green from pollen or algae then this green pumpkinseed Senko would be an excellent choice. 
    You get the idea.  Also, on dark days you want to use dark lures and on bright days you should use light colored lures.  This allows the fish to see the silhouette of your lure when looking up at the surface.    On a dark, cloudy day a black worm would be a good choice.  White is an excellent lure color for bright, sunny days.