But it’s a lot harder to imagine how sky blue or pink are supposed to be interpretive substitutes for any naturally occurring hair color, especially with Japanese characters.
One of the most distinctive visual aspects of anime is the wide array of hair colors characters have.
Oddly enough, though, all those wild hair colors are also something that continuing anime fans quickly get desensitized to, on account of how widespread they are in Japanese character design.
In the end, there’s no definitive, industry-wide answer for how anime hair colors are supposed to be interpreted.