The brightest colors – opaque florescent chartreuse, pearl, white, bright pink, etc. did work and probably would still work – depending on the day. My color choice is usually based on a whim as is lure design. Only the fish can determine what they’ll bite on any given day mostly having to do with lure shape/size/action.
When it comes to natural vs unnatural, I’m of two minds. Fish sense both but as with color don’t always strike lures that are extreme in action such as that of spoons, wide flapping curl tails or spinning flashy blades. Subtle motion is natural which the senses are tuned to at all times and lures that demonstrate that usually do better a majority of time in my experience especially when their environment tell fish to cool it. Even using black in that color water isn’t a guarantee fish will strike because of the color contrast. The sense of feel is a first priority for moving object detection (MOD for short )as well as the type of action. Vision is next – the icing on the cake – which confirms what is felt and heard.
The shad body with thin tail (pictured) is the most natural, subtle in action and shape; the others vary in the degree of unnatural/ unsubtle action. But they ALL caught fish because of a superior design/size combination as compared to many others and can always be depended on even when fish are less provocable.
When it comes to location, fish will be where they will be IMO. Some days the pattern is deep, parallel to ONE shoreline in deeper water; on other days they might be up on a flat long hump with sparse weeds – like on the day I did well. It would be great if a location pattern held for most seasons, but nature seems to like frustrating anglers or rewarding them – on a whim so it seems. In any case, know the bottom and depth of any water and by all means use sonar to at least find baitfish. Ignorance of both is like that of a blind man walking without a cane in an unknown area.