The reason for the extensive glare is because they're putting HID bulbs in a non-projector housing. When HIDs are put into the correct housing they do not create that bright glare especially when aimed correctly.
The blue comes from their choosing of kelvin. The higher the kelvin the bluer it gets, it even goes to purple. Also, the higher kelvin you go the more light output you lose. 4300k are the brightest but a lot prefer the white look of 5000k which are a little less bright not very noticble between the two.