You guys have probably never seen it but there's a kid's show called PJ Masks. One of the main characters Catboy is clearly brown skinned but when he puts his costume on - the form that's of course used for all the merchandising - his skin visibly changes colour. On some of the toys my daughter has, including a big plushie, his skin is whiter than mine. The reason why is obvious. It makes me angry.
No. everything is a little washed out, but not close to the same degree as Marina's skin. Look at her clothes for instance. Still very clearly black, just a slightly faded black. If her skin was a slightly faded dark brown, people would let it slide.
Yes, she's still darker than Pearl, but that's not the point. It's an extremely common thing for black characters (and even real life Black people) to have their skin "lightened up". TV Tropes even has a trope about this with numerous examples: