Hair dye problem

Watching a '60s movie, a comedy I've never heard of called Love in a Goldfish Bowl.

I'll turn it off in a minute.

The studio dyed the actors' hair the same color. It made it easier for them to match wigs and hair pieces. But the romantic couple having the exact same hair color makes them look like brother and sister which is deeply disturbing.

I've never seen a boy with hair that color.