Today's Marvel Snap Savage Land set provides a perfect opportunity to demonstrate what the hell yo is talking about with "blue skin" thing:


Hm, not good enough. We're going to need a more neutral background for this. yo, take me a new picture of the two of them!

Okay, much better. Now that they're right next to each other and not in front of a colorful background, you can appreciate how Shanna and Rogue have distinctly different skintones.
So it's not that she's blue blue, but she's darker and flatter. Like she's standing in a shadow. The tone might actually suit someone of Mediterranean descent, but Rogue is a basic white girl from Caldecott County, Mississippi. One who, until a week ago, wore clothes that covered everything except her face, so you wouldn't even expect her to have a light suntan.
Here's how she looks if you decrease the amount of cyan in her skintone:

And for comparison, if you crank it way up in Shanna's:

Both of those changes together:

(Mouse over any of those to see the change in action.)
Finally, a comparison of the originals and the hue-shifted versions side by side:

Rogue, shugah, you look like you've got hypoxia. You need to go see a doctor to make sure you don't have a lung disease.
