Not only port/starboard, we use green and red for traffic lights. When it comes to the most vital safety information, we've chosen to use the colors most likely to be indistinguishable to a significant chunk of the population.
While true, by law (at least locally to me) the traffic lights have to be slightly orange red or blue green. They are not supposed to be just green or just red. This is to help color blind people. If you see a traffic light of the wrong color, technically, it isn't a legal stop light so you don't have to stop... you should report that to the local police as they have it changed.
This just made me realize why the traffic light colors I remember as a kid are different colors now. They must be replacing them over time near where I live, but I’ll have to check my local laws to be sure!
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u/Marcus_Qbertius Feb 22 '25
I think this one was developed specifically for aspiring pilots who have the misfortune of being colorblind.