That one photo almost shows an irradescent quality to the paint. I could reccomend a lot of colors that fit that vague description, but it that is pearl I am seeing in the top edge of the tank, you couldn't do it in single or 2 stage. it would almost have to be 3 stage, to get that effect. I can see how it appears blue, but at the same time, if I am seeing the correct shimmer, I'd say it's a silver basecoat, with a pearled clear ontop. That's how I would imagine kawasaki painted it. blue pearl in large quantity, but with regular pearl also, to give it the other colors. If anyone has a piece they are willing to send, I am sure I could get an exact formulation. If you want something played by "ear," I'd say 1 oz of blue and 1/2 oz of pearl per quart of clearcoat, sprayed over a silver metallic basecoat, and then finished with a couple coats of non-pearled clearcoat to seal it in.
close-ups, or an actual piece would make it easier to get an exact match. I can fool around with it the next time I get a chance, but without something to compare it to, it's a bit of a waste.