LED's still play by the same rules that most other light plays by. The difference is in what amount of what color wave lengths the "white" LED is using to get the white light. That is why some are more blue, some are more yellow, and some are actually "white". When you add "all" colors together to get some form of white and you can still filter with colored lenses. If an LED does not produce a color that a filter will let pass, then you get reduce light output of the desired color due to that lacking color. This can let you play tricks with different lenses. When I was pulling my ZZ trailer, I put LED bulb's in the lens because I wanted red turn signals behind the outer red lens/amber inner lens so I could use them as brake and turn. A white bulb with amber inner lens/red outer lens would glow amber but show as red with no lit bulb behind it. Red LED's there would only glow red. While I was at it, use an LED bulb in the center tail/brake section. But, that section also had a clear underside lens for the tag. That meant I had to use a white LED. It worked just fine, everything was only red. The LED TV's we have are special 3 color LED's that vary how much "red", how much "green", and how much "blue" is being displayed by each and every LED chip to get those vivid 4K pictures. There is a bit more to it for a TV than that, but most of that has to do with how it gets the resolution and fine tuning for color correctness.
