Shoudn't Andromeda be black?

This one is my favorite; her face and hair are so pretty, and how her breasts and the outline of her leg are barely visible through her dress...

>tfw no Homeric literalist gf

It's possible that the Perseus story is in a frame, I'd have to check closer.
Moreover, we should understand that the works of Ovid, Catullus, and Virgil are all highly playful and not at all attempts to straightforwardly set down tradition. One of the professors at my uni has a book all about their constant deliberate discontinuity. But seeing as how Ovid has become the canonical source for post-pagan depictions, it's still worth checking if it has an explanation in him.
>Maybe Cassiopeia was from a Greek colony or something
Pretty much what I was proposing, though in this case the colony would Phoenician (or Proto-Semitic or whatever)