This is one of those actually cool optical illusions

Hm.. when I glance at it, yeah I see the white is very very light pink. But once I focus on the details, I see no trace of red.

And what color does white have?

Great lectures on this kind of thing:

https://m.youtube.com/watch?v=af78RPi6ayE

https://m.youtube.com/watch?v=mf5otGNbkuc

...I was gonna say it took until it was shrunk down to the thumbnail to see red, but nope, it actually has red in it in the thumbnail.

Guess this is specific to how often you see cans of coca-cola?

Here, I put the image through a ditherer (only available colours are black, cyan, white). I don't see any red at all now.

[edit}

Actually, that "red" is mostly just gray so I played myself here. Still, the luminosity must be closer to red before I detect it as red, white doesn't do it.

Burn the witch!

Except that there is. Alright, maybe not exactly, but...

The whites that you see as white (in the other white parts which don't seem red), are shifted like #E0F9F8. Notice the reduced reds there.

The whites you see as red are shifted like #F9F9F7. This one, I'd probably call yellow, but you get the point, reduced blues. There's probably a better example pixel in there and I just haven't found it.

The red pixels in the thumbnail, well, maybe JPEG downscaling? I can't say, because I don't know what downscaling algorithm is being used.

So the parts you see as white, are actually bluish white in a sea of blue (Cyan is just mixtures of blue and green in case of RGB) and the part you see as red, are reddish white, in a sea or blue.

Also, for those who don't see red, don't look straight at the image. Look at something near it, with the image in your peripheral vision and you'll get what others are saying. But I guess that happened while you were reading the title.

Pretty sure this is stolen from a Facebook account I follow but I can't remember the name at the moment and will edit it in if I find it

Edit: the account name is Japanese

2nd edit: found it

https://www.facebook.com/share/6U4q8zuJr7usVgtk/?mibextid=qi2Omg

Fucking pattern recognition...