Originally Posted by TheOtherRob

Yes all 370z's have HID's. What your seeing is the HID bulb warm up which will look blue for a few seconds. From a distance the color of the headlights do have a blue tint to them stock. If you want to enhance that color I would suggest opening the headlights and installing a clear lens. This will allow a sharper cut off and give you more blue and purple. Changing out the bulb to a higher Kelvin rating will give you more color but the higher you go the more you lose visibility.