There’s actually a fascinating story behind the hair color choice.
Two of them, Andrina and Arista, are shown to have blonde hairin the film.
They don’t sell.'

And they’re making the dolls.
“Nowadays, you see that hair color, it’s not that unusual anymore,” said Clements.
It wasn’t just the toy company that objected to Ariel’s hair color.

Former Disney chairman Jeffrey Katzenberg wanted Ariel to be a blonde.
“I don’t know exactly where that came from.”