I'm old-school. My off-site backup is literally disks kept at my friend's house (and I keep his disks at my house).
Some more info in the second half of this article: https://www.damiensymonds.net/how-do-i-retrieve-lost-or-damaged-images/
Some of these are very mild. So let's see if we can get away with the easiest method of all. That is, add a Solid Color layer of good skin colour, and set its blend mode to "Color". Then invert the mask to hide it, then use a 10% white brush to paint it over the blue areas.
Perfect ❤️
Word of warning - that setting can change again without a word of warning, at any time. So every time you open a raw file, always remember to glance down there to check that it's still on sRGB.