The blue tint in question is HID, or high intensity discharge bulbs. Instead of working like a regular incandescent bulb which passes electricity through a tungsten filament suspended in halogen, xenon, etc..., it uses a spark through gas to create light. The result is the instant-on effect, rather than fading on and off as a regular filament heats up/cools down, and light that is a much higher color temperature (bluer). HID systems require an electronic ballast to step the normal 12v car electricity up to the thousands of volts needed to create the spark in an HID bulb, and they require projectors to keep the light contained so that it doesn't blind other drivers.
The sky does NOT have HID, although I can see this being an option in the future, and I'm sure enthusiasts will install aftermarket HIDs in their skies. This usually costs around $800 to do.
You can approximate the look of HIDs with color-correction coated bulbs. Be careful what you buy though, because quality is important and you get what you pay for. Cheap aftermarket bulbs look green or blue, and don't provide as much light. Nice bulbs like Sylvania SilverStars (google this) or PIAAs will have a near-HID color temperature and be brighter than halogen.
