The d2s is an hid lighting. It is an arc source type of lighting available as an upgrade feature in new vehicles from dealers. The white output, and the reflector design system, tend to give it a bluish/purple look. When replacing the xenon bulb, both must be done at the same time. The xenon bulbs change color with usage & time, hence the reason why one bulb will appear yellow & the other 'blue'.
Finally; all stainless steel license plate frames.no more rust stains! From Porsche, of course. Appropriately finished and packaged with matching colored caps for your screw heads(4). Brass shown. Titanium finish has brushed stainless finish.