There are many! 'My Little Pony' is one where the ponies have all kinds of colorful hair.
You could check out 'Rapunzel's Tangled Adventure'. Rapunzel herself has long, golden hair, and there are other characters with various hair colors too. Another one is 'The Powerpuff Girls', where the girls have distinct hair colors that add to their charm.
One popular one is 'My Little Pony'. The ponies have all kinds of colorful hair and it's loved by kids.
Some good options for kids with different hair color cartoons are 'Barbie' series and 'PAW Patrol'. In 'Barbie', the characters often have different and beautiful hair colors. In 'PAW Patrol', the pups have unique color schemes too. They are both enjoyable and educational for children.
One such manga is 'Fairy Tail', where some characters have red hair and play important roles.
You might consider 'Tangled'. Rapunzel's long and voluminous hair could be seen as having poofs. The way it's animated and styled gives that impression. Also, in 'Brave', Merida's wild red hair has some poofy elements to it.
One such cartoon could be 'My Little Pony: Friendship is Magic', where some ponies have orange hair.
You might consider 'The Hunchback of Notre Dame'. Quasimodo's hair is often depicted as messy. Also, in 'Brave', Merida's hair is quite unruly.
In 'Steven Universe', there are characters with unconventional hair. Like Garnet, whose hair is a big part of her distinctive appearance.
One such cartoon is 'Sailor Moon', where some of the characters have yellow hair.
One such cartoon is 'Tangled' where Rapunzel has long and wild hair. Another could be 'The Powerpuff Girls' with their unique and colorful hairstyles.
Well, 'Avatar: The Last Airbender' comes to mind. Aang's hair is often depicted as wild and unruly. Also, in 'Teen Titans', Raven has that kind of wild hairstyle that adds to her mysterious look.