I have not ready many color studies, and can only draw on experience with other sport fish. I do know that for rainbow trout on streams in Western Alaska, when Sockeye Salmon are spawning, color is the very important. An orange bead painted with pearl finger nail polish will catch rainbows every cast. When you look at an orange bead, and a fresh sockey egg in the air, they look identical. In the water the real egg gets a white look to the outside. Finger nail polish imitates this foggy look perfectly. Believe me a bunch of Alaska guides would not get caught borrowing their girl friends finger nail polish, if it didn't make a difference. I have watched clients catch fish every cast with these beads, while I experimented with other colored beads and yarn flies. Even going so far as to soak the other baits in salmon egg juice. The orange painted bead always out fishes the other offerings 100 to 1. Even when my clients mend incorrectly, making very bad drifts, they still catch fish, while I make perfect drag free drifts with other colors catching no fish. I understand that rainbow trout are not bass. I will point out that both are predatory fish, that can see color. It is easy to experiment with trout in Alaska, because I can eliminate most other variables, because the water is clear, I can see the fish, and catch them in large numbers, for many days in a row. I have also had similar experiences with artic grayling, King Salmon, Silver, Salmon and Yellow fin Tuna. I have fished and guided for many other species of fish, that I assume prefer different colors in different conditions, but I have never had the opportunity to eliminate enough variables to make a firm conclusion. On a side note. the same trout will hit a mouse pattern drifted over them all summer, until the salmon start laying eggs. Once the first eggs hit the water, you could drift a mouse within inches of their nose, and they wont even notice. I have tried many times. This is my best example of matching the hatch. Again I know the other species I mentioned are not bass. I am aware that bass might be completely different. I can only assume bass have some similarities to these other predator fish with color vision.