10000K Xenon HID lights produce white-blue light with a touch of purple hue to it. 10000K is probably as high as you want to go for a street car, both to stay legal and to have any kind of visibility on the road. At these high color temperatures light output is significantly reduced, especially during rain or fog. Higher color temperature lights appear brighter when looking directly at them, but they how lower light output as far as the drivers visibility goes. 10000K Xenon lights have approximately 2300 lumens of light.
Not sure what bulb your car is using? Try this Automotive Bulb Reference
site to get the proper bulb information for your car.