Your screen on your phone is RGB. Red Green Blue pixels. There is no yellow light ever being sent to your eyes. So if you were to look at a yellow square on your phone the pixels are RGB in a mix convincing your brain it is yellow.

So when you get a blue dress with warm yellow light, the pixels on your phone tries to convey that bit of yellow

Different devices will show it more or less.

If you printed out the picture there would be no illusion.

[–] WolfLink@sh.itjust.works 1 points 2 hours ago (1 children)

If you printed out the picture there would be no illusion.

Why would this be true?

[–] scott@lem.free.as 1 points 1 hour ago

They're saying screens use RGB which has no yellow, directly.

Printing uses CMYK which can print yellow, directly.