Brand new Xenon lights will not be as blue when first used. They will be slightly yellowish white. After about 200-300 hours of use, they will turn more whitish bluish. It's called color shifting. Xenon bulbs are desinged to last about 2000-3000 hours vs halogens which last 250-300 hours. By the end of a xenon bulbs life, it will be almost purple.
Also, the amount of blueish color you'll see depends on what angle you are at when look at your light from in front of your car. Your lights will always look blue to oncoming traffic.
As for the guy who's lights are pointing at the ground, you just need to aim them or take the car to the dealer and have a tech do it. When you first turn them on after the the car has sat for a while, they should be pointed at the ground. And after about two seconds, they should automatically move upwards to where they arepointing straight ahead. If they are pointing at the ground after they have stopped moving, you just need to turn the little wheel on the back of the headlight until the light is at the level you want. The wheel is black and has a spot for a phillips head screw driver in the center of it. Each headlight has two wheels. One is for up and down aiming, the other is for left and right. If your headlights are moving up or down very little as you are moving the wheel a lot, them you are adjusting the left and right wheel. When you adjust the up and down wheel, the level will move significantly. This is for E46s.
Bi-xenons simply mean that the they are hi and low beam. When you push the stalk forward, they projectors will let more light out.