I would go for white also. I have seen some cool retros where people hide an orange behind a shroud that lets light through and use it to flash as a turn signal.

I have had great success with the TRS XB LED angel eyes. They're durable, easy to work with and can be seen clearly in broad daylight.

As for demon eyes, I always just think it's one more thing to get wrong, or go wrong and can really only be seen when it's dark enough that you should have your low beams on anyway. Demon eyes are more for 'hard parkers'.

I reckon what looks good and is easy to do would be to paint the shields blue to create that blue tinge to the lens when the lights are off. Orange also looks cool, but blue is probably a more OEM+ look.

Also, if you aren't using it already - the rubber butyl from TRS is fantastic stuff for when you have to open/reseal/open/reseal headlights......