There are several. 'My Secret Romance' has a character like that. It's a popular one.
The character could be part of a secret society. Her pink hair and green eyes mark her as special within this group. They embark on dangerous missions to protect ancient artifacts, and she uses her unique charm and appearance to deceive enemies. For example, she might pretend to be a harmless maiden but then surprise the bad guys with her combat skills.
You could check out 'Steven Universe'. It has some characters with pink hair. These cartoons often showcase the uniqueness and charm of characters with this hair color.
You could check out 'Blossoming Hearts'. In this manhwa, there's an LGBT character with pink hair. The art style is unique, and the story is full of emotions and surprises.
There's 'Love is an Illusion' which has a character like that. It's quite popular among the LGBT community.
There are several like 'My Pink-Haired Heroine' which has gained a lot of popularity. The lead's pink hair adds to her charm and the story's appeal.
One popular one is 'My Little Pony: Friendship is Magic'. There's a character named Fluttershy who has greenish hair.
Well, usually such cartoons might have characters with bold and unique personalities. Maybe they stand out in the story for their unconventional looks.
One such cartoon could be 'My Little Pony: Friendship is Magic', where some characters have those features.
One such cartoon could be 'Tangled'. Rapunzel has blonde hair and green eyes. It's a well-loved animated movie.
Often, characters with pink hair in manhwa are associated with a certain charm or quirkiness. It could be used to represent a rebellious nature or a non-conformist attitude. Also, it might be just a visually appealing trait to make the character more memorable.