The reason could be that the creator wanted to give the kid a distinct and eye-catching look. Orange hair might symbolize something special about the character's personality or background within the cartoon's story.
Maybe it's a fantasy cartoon where the kid has magical powers and is represented by the colors orange and black. This could give the character a unique and mysterious look.
The cartoon orange kid with blue hair could potentially be a symbol of non-conformity or represent a fantasy element. It might also just be a visually appealing design choice to catch the viewer's attention.
In the Old Nick cartoon, the orange-haired kid is often shown as brave and not afraid to face challenges. They also have a kind heart and are willing to help others.
The orange hair might make the character stand out and be more memorable. Nick being a kid doctor could show that kids can have big dreams and capabilities.