But with white women it is good dark, light bad.
Not really. There is a fashion niche to having a
light tan, but there is no general "good dark, light bad" cultural morality going on with white women. Look at what is pushed for children to see what the basic morality is. There is no dearth of light, blonde, blue-eyed culture being pushed for children. In the super-popular-to-white-girls "Frozen" movies, for instance, the lead character is as white as can be, while the secondary character, lower in the hierarchy, has dark hair.
It's annoying but interesting how they lighten female characters for children that had initially been dark. The Star Trek: Discovery character of Michael Burnham is a dark-haired, dark-eyed, medium-dark skinned black women. But in the animated version for children, they portray her as a light-skinned, hazel-eyed, tawney-haired, and lightly freckled...obviously bi-racial. The Disney character Tiana (The Princess and the Frog) was originally portrayed as dark skinned with typical Afroid features, but when animators re-imaged her for "Ralph Breaks the Internet," they revised her as light-skinned, hazel-eyed, tawney-haired, and lightly freckled...obviously bi-racial...which seems to be a trope these days for what "black" is supposed to be for black women in media.
There is a whole ground-swell (you've apparently missed) of annoyance from black women that the media is replacing them with bi-racial women because "good dark, light bad" is definitely
not a thing with white women who are making the casting decisions.