I have Ultraviolet (Purple) parking lights in my black coupe. When my 6000K 55W HID's are shining, you can't really see the purple unless you look up close.

Adds a nice effect at night though once your turn off your car/headlights and get out and close the door. (They stay on for a good 15 seconds).

They're 194 wedge bulbs, bought from superbrightleds.com (6 LED bulbs, I tried 9 and 12 but they won't fit in the housing).

-Eric