Here's a couple kelvin charts
http://www.kryptonbulbs.com/images/kchart.jpg
http://www.besthidkit.net/wp-content...olor-Chart.jpg

The part numbers are slightly different, so its possible the K rating WAS different.
CV36 = 26297-89902
Z34 = 26297-89903

They've merged to this = 26297-9B91A

Was the dress blue and black or white and gold ?

I had to replace my entire headlight (not just the bulb) because I got into a fender bender and screwed up one of the lights. The newer headlight has a whiter bulb than the original from 2009. Now I have one headlight that is white and the other which is slightly blue.

that is probably due to the age of the older bulb. HID bulbs get more blue/dim as they age. you can probably just change the old bulb to match the color.