Around this area anything with orange in it seems to be a great trout bait. I fish lake trout and salmon in Lake Superior where my go-to baits all share gold and orange color pattern. I fish trout in our SE minnesota streams using Original Rapalas with an orange back over a gold belly. I have a stocked lake less than a mile from me in town where I do my winter jigging for trout and gold Kastmasters and Swedish Pimples with a stripe of orange tape on them reign supreme.
In all instances the water is super clear. Water color and staining can change the colors but just about everyone I know that fishes with me in these locations uses a gold/orange color pattern. Since salmon eggs are that bright orange and plenty of people use them in the lake near home to get trout I am going to go out on a limb and say that orange has a big part in their productivity. Even those jars of PowerBait trout dough seems to be used more in orange than any other color.