Final answer:
A person with strawberry blonde hair is relying primarily on eumelanin and pheomelanin levels in the body. Strawberry blonde hair has more pheomelanin than eumelanin, which gives it the reddish-blonde hue.
Step-by-step explanation:
A person with strawberry blonde hair is relying primarily on a unique mix of pigmentation that gives their hair its distinctive color. Strawberry blonde hair color results from a combination of a lower level of the dark pigment eumelanin and a higher level of the red pigment pheomelanin.
The genes responsible for producing these pigments, particularly the MC1R gene, play a significant role in determining hair color. Variations in these genes can lead to different amounts and types of melanin being produced, which in turn affects hair color.