QUOTE(Mikey914 @ Aug 1 2021, 09:01 AM)
It is amazing how much amber does show through in the smoke when an amber LED is used. In all fairness, it's not a bright so in the daylight it might not be as easily seen.
I did something similar on my tail running lights. I run Euro lenses but US DOT wants to see amber side markers on the front of the car and red on the rear. Their argument is that it lets other drivers know which direction your car is moving. I put red LED bulbs in the rear side marker slots which show as red through the amber lens when turned on. Turn signals have amber bulbs and still show as amber.
Personally, I think any side markers that increase visibility of the car without distracting other drivers is fine so go nuts. DOT is more picky but I think those smoked side markers would pass their requirements.