The whole argument around it is not how we perceive it but how camera perceived it in a flawed lighting condition.

That's like taking a shitty 2 Mpix photo with a potato from 2003 and truncate it to 8 bits and then claim broccoli is fucking blue because the camera had no fucking concept of a tone mapping or color temperature and captured it as blue.

Also if you put color picker on it it'll be in the white spectrum and barely register a mild hint of blue. And if the dress was blue, then you're one shitty ass photographer and has nothing to do with our actual eyes. You can make a blue dress look almost white. Anyone who ever had aquarium with beautiful metallic blue fish and used wrong lighting and turned them into bland beige silver color will know what I'm talking about.