Acura tsx hid bulbs?

I recently bought a 2006 Acura TSX. Does anyone know what is the original hid bulb for this car. I have the phillips 4300k in there, but when i pull up next to other tsx theirs are more white and brighter than mine. mine have a yellow look on there. What is the original oem bulb the Phillips or the Xenark bulb.? and at what Kelvin temp. does it burn?