I don't know about that but I have read that Japan has a yellowish green paint formulated to reflect light to keep the car cooler.
japan gets all kind of good stuff they keep from us to make them feel special. funny how they acknowledge the pip flopped, when they never even tried to sell it. will be interesting to see how it does once the beta buyers are done, and practical drivers look at 4 seats and small hatch space.
Both Gen 4 and Prime are available with a "Highlighter yellow" paint called Thermo-Tec Lime-Green (6W7). It's a special heat-reflective paint. Gen 4: color choices | Page 3 | PriusChat PHV S Navi Package w/ Solar Roof option:
Good for down south where it actually gets hot for significant periods of time. But, you'll be driving a yellow car. YMMV