Maybe you could take the blue all the way up the sides to the stock pinstripe line which is about 2 inches below the windows. Run the blue over the grill and hood to the louvers near the windshield wipers. The blue would be on the back, up to around 2" below rear window (same stock pinstripe line). Maybe a thick medium (?) gray (?) pinstripe to separate the blue from the white. Essentially, the truck will look like it is painted blue, with a white convertible top. The gray accent between the colors might ease the transition.
Just an idea.