I have the Lamin-x optic blue on the fogs now.
Overall I'm pretty happy with them. During the day, while off, the fog lights look blue. When on they look a bit whiter than the headlights, so, they don't look blue, turned on, when you're looking at them. However, from the driver's seat, with both fogs and headlights on, you can really see the difference as the light made by the fogs is white/blue and the headlight light is yellowish. The blue fog light actually helps me a lot in the fog - I can see much better. Plus I love the effect :) Next is to get a white/blue light bulb.
~ Shadowfax ~