Up here in the reservoirs of New England, I do not see color as much of a variable between the start of the season (ice out) through mid-summer. I believe a stronger contrast may be slightly beneficial in the spring, but I've never quantified that. Usually, if you have a couple of "stand-by" colors, you're pretty much good to go, regardless of the season.
Some excellent choices in my neck of the woods includes anything with some chartreuse in the pattern as well as the more shad like colors, such as albino shad or crystal ice. I have a huge assortment with me on any given day and I love to switch it off when the bite is hot, to see if color matters much. On some occasions it does.....others not so much.