Greta Gerwig cites The Umbrellas of Cherbourg one of her inspirations for Barbie.
While it could be that Barbie's hair in the scene where she visits Weird Barbie is a reference to Catherine Denueve in The Umbrellas of Cherbourg, I think it looks more like this sweet illustration from Barbie Magazine.
The Umbrellas of Cherbourg is also a favorite movie of Barbie doll designer Robert Best, whose illustrations can be seen on many collectible Barbie boxes. His illustration of a scene from The Umbrellas of Cherbourg is below.



















