It is possible to be born with naturally pink hair due to a condition called 'Porous Follicle Syndrome'.

noli's read

This idea of naturally pink hair is intriguing, but it conflicts with the realities of hair biology. According to reviews by the Society for Investigative Dermatology (expert opinion), our hair color is determined exclusively by the concentration of two pigments: eumelanin (dark tones) and pheomelanin (light and red tones). There is no human biosynthetic pathway capable of generating pink or pastel shades innately. Furthermore, in-depth research shows that 'Porous Follicle Syndrome' does not exist in scientific literature. While the porosity of the hair fiber is a very real physical property that influences the absorption of water or treatments, it cannot in any way produce new colored pigments. This claim therefore stems from entertaining content or a visual filter rather than a biological reality.

the sources

No named source held this one up — that absence is part of the verdict.