Many fanfics use Naruto's black hair as a way to make him more relatable to the readers. It's a common hair color, and by emphasizing it, the authors can make Naruto seem more like an ordinary person who has extraordinary adventures. For instance, in a fanfic where Naruto goes on a journey outside of the ninja world, his black hair is what makes him stand out as a foreigner, but also what makes him seem approachable to the new people he meets.
In some fanfics, Naruto's black hair is a sign of his connection to an ancient clan. It gives him special powers or abilities that are unique to his lineage. For example, his black hair might glow when he accesses a certain level of his power.
His black hair can be a point of contrast in fanfics. Against the bright colors of his ninja gear or the colorful jutsus he uses, his black hair stands out. It can also be used to show his mood. When he's angry, his black hair might seem to stand on end. This is a really interesting way to add more depth to his character in fanfics.
The best chapter pointer here is Chapter 89, "Brother He, how can you be so unreasonable too?!". It opens with Director Sun took a step back, "What's the rush? and closes on If anyone should be mocking her, it should be me.] Wen Jiaojiao stood to....
If you want the clearest chapter reference, go to Chapter 67. Early on, I'm pissed," Jiang Yan cursed again, "These people are too much, aren't...; later, the chapter leans on They expect us to fend for ourselves even to sleep and to eat—I mean, at....
The best chapter pointer here is Chapter 101, "Hello, My Name is Zhao Daniu". It opens with Jiang Li walked over to the slope where the two had fallen down. and closes on If you encounter any trouble in the future, you can come to me..
If you want the clearest chapter reference, go to Chapter 115. Early on, Jiang Yan was woken by a loud crowing noise.; later, the chapter leans on Annoyed, he opened his eyes and saw that the hen, which should have been....
If you want the clearest chapter reference, go to Chapter 34. Early on, Seeing that the public sentiment wasn't quite right, Su Yinwan felt...; later, the chapter leans on It was she who had anonymously paid someone to write the critical article....
A practical answer is Chapter 95, because it turns the idea into a concrete scene. The chapter opens with Hearing others praise her daughter, Aunt Lin was smiling so wide she..., adds pressure through And once everything is settled, escaping might become very difficult for..., and ends on Your.
Chapter 83 is the strongest chapter-level answer because it starts from When they received the task, the three of them were already sharpening... and follows through on Since all the guests were staying at Uncle Zhao's cabin, Director Sun....
The best chapter pointer here is Chapter 73, "Does Someone Like Jiang Li Deserve to Have a Fan Club?". It opens with Director Sun, tongue-tied, finally managed to squeeze out a sentence,... and closes on Despite Wen Jiaojiao's fiery temper, there were still many who were drawn....
A practical answer is Chapter 51, because it turns the idea into a concrete scene. The chapter opens with Oh, okay." After uttering two syllables indifferently, Jiang Li bent down..., adds pressure through With this in mind, she looked up and scrutinized the worried faces in..., and ends on If I.
Look to Chapter 57 for the clearest answer. It begins with Lu Xingchao's numerous fans were stunned., keeps building through Holy shit, what's up with God L?, and lands on I'm saying, big bro, can you at least reply to me?.