I've never heard of HID's melting anything, I had this kit on my Grand Prix for a while with no problems. My buddy has the same kit on his Grand Am and has had it on for even longer than I had mine with no problems either. Only positive things to say about them.
Actually, the violet HID has a higher kelvin temp than blue HID's. And the white is lower than the blue, but an aftermarket white looks green. So, put out the extra cash and get a Sylvania HID kit, ya get the color ya want and no matter what color ya get, it's not gunna melt the headlamps or wiring harnesses. And they're legal