Yup, blue anywhere is a no no.
Red shining to the front is also a no no.
Even red on the side of the vehicle must only be on the back half, front half must be amber or white.
Around here they are even pulling over the ones that drill out the center of the tail light to install a blue crystal, from a distance you really can not see the blue but it does give the whole tail light a purple hue.
They are also nabbing all of the cars that went with the blue HID headlights. It seems that about a 6000K color is as blue as you can get away with.
If you have color changing LEDs, they are for show only and can not be visible while in motion because the will go red and blue.