Hi Count,
The 6000k has a bluish tint to it, but the light is mostly white. You can go with 5000k and get a slightly whiter light. With 4500k you'll start getting some yellow. 3500 is yellow as is used for fog lights mostly. I believe ycharlie is running 3500 k in his fogs and 6000k in his high beams and he has pictures of it in his thread. All HID companies I spoke with recommended 5000 or 6000 k if you ant to go with the OEM look. I went with 6000k since it is one most people get and I saw ycharlies photos and I was impressed.
To give you an idea, the 6000 k color temperature is very similar to the LED signature light color. Very similar light. White with a bluish tinit. I myself like the bluish tint and I think it makes it easier to see in the dark. If you want less blue go with 5000k. 6000k is The color most recommended and most installed in high beams according to the companies I spoke with. I believe the OEM ones in LR are 6000k or close to it. Don't know that for a fact but I compared my HIDs with my friends RR OEM HIDs side by side and they look pretty similar.
Ycharlie, you have had these much longer than I have, any input?
definitely similar. though i feel the kit's output might be a tad brighter. then again i try not to stare at the lights long enough as it's not all that fun or interesting. hahaha. it's a good upgrade, guys. cheap and efficient.