You might consider 'Doraemon' as an old cartoon show with blue. The robotic cat, Doraemon, has a blue body. Also, 'Scooby-Doo' has a character named Velma who wears a blue dress and glasses quite often.
There's 'Blue's Clues' which is an educational cartoon for kids. It has a lot of blue elements throughout. Another one could be 'Avatar: The Last Airbender' where the water tribe characters often have blue clothing or features.
Well, one such show could be 'The Smurfs' where all the characters are blue. It was quite popular back in the day.
One such show could be 'Penguins of Madagascar', where you might find blue penguins. It's a fun and popular cartoon.
Maybe 'Super Blue Puppy' is one. It has a blue puppy that saves the day with its heroic abilities. The show has a lot of action and adventure.
You might want to check out 'Sailor Moon'. Some of the Sailor Scouts have blue hair. Another option could be 'Adventure Time', where there are characters with blue hair in its imaginative world.
You might want to check out 'Senior Dog's World'. It showcases the life of an old dog and his experiences. The animation is cute and the stories are heartwarming.
Well, there's 'Rugrats' - a popular one with Nick characters. It's full of fun and adventures for kids.
Maybe it's 'Blue's Clues'. It had a blue dog named Blue and sometimes wore accessories like a tie.
There's also 'The Penguins of Madagascar' which has some blue penguins. It's an old cartoon that might fit the description.
There's also 'Baby Looney Tunes', which focused on the younger versions of classic Looney Tunes characters.
Another old cartoon show is 'The Secret of NIMH', where some bird characters play important roles. The animation is quite beautiful and the plot is quite captivating.
Well, one classic is 'Scooby-Doo', where a group of friends solve mysteries with the help of their dog, Scooby. It's been loved for years!