Will red LEDs shine thru red lenses? White obviously will.
Strict legality aside I doubt there are many if any prosecutions for this. I have a strobing 3d brake light on one of my cars as it's a small car and folks love to tailgate it. Quick flash followed by pulsing followed by constant on. It's an in-line module in the wiring.
2006 Roo 23SS behind a 2017 Ford Expedition