I've played this color game with crappies, sunfish all across Minnesota and Wisconsin and walleye/sauger in the Mississippi River from St. Paul to Iowa. Water color/clarity have been specific drivers in color choice. So has the weather, water temperature, water depth, fish mood and an on-going list of essentials in determining the right color for the time I'm on the water. Something that has always puzzled me is how one specie of fish, say the black crappie, can appear to have a strong color preference in Minnesota and not even notice it 100 miles away in a Wisconsin water almost identical to the Minnesota water.
Does anyone have a theory on why specific regions' fish can have color preferences so far different when the physical elements affecting the water remain nearly identical?
I'm not a scientist but I do a lot of journaling of my fishing time. One thing I have noticed locally on a daily basis is that a color working great at pre-sun rise into mid morning can simply fade in effectiveness as the morning wears on. I've seen purples do well until 10 AM and then simply stop getting bit, while changing to a blue will fire things right up again. I've seen how clouds versus clear skies shift certain color specifics. I've seen where a shade line on a river will make all the difference in color choice depending on whether I am fishing in the shaded or the sunlit side of that line.
I fished a Wisconsin Crappie tournament with a friend a few years ago. Took second in it. My buddy lives about 100 miles north of Minneapolis/St. Paul on the eastern side of Minnesota . The tournament was held about 60 miles due east into Wisconsin. The lake the tourney was held on was identical in every aspect to a lake found less than five miles from my friend's house in Minnesota so we did a day there prior to the tourney. We found colors that worked like a million bucks there the day before and decided that we should start with that pattern, but when the fishing at the contest got started it didn't take me long to figure out that a serious change was going to have to happen. My friend was stubborn and banked on a change in his hit pattern as the day woke up and got brighter. Since we were fishing for our own fish, I got in color change mode real quick. I also began putting fish in my well, fish that taped nice lengths. At the weigh station I had 3 ounces under the leader with my 10 fish tourney limit. My friend, in his stubbornness, did not make the top 20. This event was one of those learning exercises for me, but it also opened up this question that I haven't found an answer for.
So...why will a color work in one place but not in another place a short distance away when the water seems the same?