Both

How do u guys tell the difference between Duwey , Huey and Louey?

Blue, red, green

In the comics they have the same personality, in the series they have different

@Iwillhavethisusername I look towards Quack Pack and DuckTales 2017 as the source for distinction between the three. Of course, Quack Pack's and 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.

I know they got different color clothes , but I just don't know which colors belong to who! I only read the comics , not the cartoon , but if I did it would like help.

Blue Dewey

Red Huey

Green Louie

@TheMidgetMoose May I ask where I can watch Ducktales? Thx

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.

@Theo0005 Thx so so so much ! I have been waiting for like 7 years to learn which is which.

I think it airs on Disney Channel in the United States and is also available on Disney Plus, I believe. Not sure about other countries. I haven't actually watched the show any in the past year, so someone else can probably give you more information.