Virtually any hair color is possible in anime, which is why there are so many iconic female characters with distinctive green hair. There are a lot of great anime heroines out there with black hair.

One challenge is that we look at hair colour based on three dimensions — lightness, red‒green axis, and yellow‒blue axis — but we have not had a technique that quantifies what is happening ...

It's essentially a cropped cut hair, but a little bit tousled and grown-out. I, along with everyone else on the planet, was hankering after a reinvention. And what better—or more straightforward ...