Honestly, I don't put a lot of consideration on top water colors. For bass anything that has shad or baitfish coloration is what I shoot for - silvers, whites, grays, greens. I like to fish Sammys on KY and have switched colors from say pearl ayu (green back white belly) to aurora black (dark back, bluish sides, silver belly) and not seen any notable change in the bite. Spin around to fishing bluegill on surface - small lures. I like my lures darker as I think bluegill are more drawn to bugs than baitfish. But in the end I still think it is more the action that color on surface that attracts the attention. I was fishing some ponds in southern alabama this morning and catching both bass and bluegill and it is interesting in the different cadences of working small rapalas which would prefer. The bass preferred it quicker more erratic where as the bluegill preferred a slower, twitching more on the surface action. Focus on cadence more than color for what triggers them -- slower and more subdued or faster and erratic. Back to bass sometimes they like to look at it more before committing and other times they trigger by a faster action like the baitfish is fleeing...
kc