All the car company's are going with different hues lately. New Lexus and scions are more tan than anything. Not the xb's but frs for sure.All standard auto-glass is tinted, usually green. It is more noticeable in a convertible, where you can compare-and-contrast, making it VERY visible. Heck, just compare your windscreen and an open side window, in ANY vehicle.
Usually, the difference is a built-in subtle green tint.