@Iwillhavethisusername I look towards Quack Pack and DuckTales 2017 as the source for distinction between the three. Of course, Quack Pack'sand DuckTales's portrayal of the two are totally different, so I guess that you just have pick one show to go with or sort of come up with a mental "average" of all versions of HDL.
Well, the comics don't usually make that distinction, of course. I think it was the old DuckTales that established that Huey wears red, Dewey wears blue, and Louie wears green. Of course, they sometimes just all wear black in the comic, so it's really hard to tell the difference in comics.