All of the above are valid comments...however, I will add this...if you want your lights to be blue, go HID 8,000 kelvins and you will get this effect, 10,000 kelvins and it will be nearly entirely blue with a tinge of purple.
Phillips Blue Vision bulbs will give you the icey white effect but not blue as you desire.
Personally, I have 8,000 kelvin lights in my car and love them. Have not been pulled over by the cops once. Actually, 1 copper one time even said that my lights were really handy for dark roads. So there you have it. I think this topic is pretty much closed.