The light and shadow made the colors look better… but I still preferred them with purple and black hair. Although this one helps setting Komurasaki apart from her lookalikes.
Anyways, what I like the most about this is thinking until this moment Oda didn't knew what color Komurasaki hair would be. Even though he planned her for a long time (he mentioned another Hancock/Shirahoshi beauty would be introduced in Wano), actually had introduced her already and drew some of her scenes, up until the moment of coloring her on the cover he still didn't had her hair pinned down. That's really interesting as a hint of his creative process.