Greg - I think I know where you are going with this.
I like your trend towards Icon planform
As for chord - an example is the red on my Victor. In most instances at Davis it is far more visible than a comparable black bottomed aircraft of the same chord. So chord alone is one factor, but color and specturm of light shifted due to particulants is another. And you cannot account for all conditions - just how much you are willing to compromise to get your target AR