Buses appear to be reddish, though the pixels are not.pic.twitter.com/mJquYSzncE
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Buses appear to be reddish, though the photo is gray-scale.pic.twitter.com/hL0wPcBtpk
Here, without grid. Strawberries in grayscale look red anyway.pic.twitter.com/5VWBesiNkP
it's because the cyan is all blue and green in the pixels, making the red in the gray pixels (green blue AND red) stand out more
how
This is not a grayscale image at all. There is color in the grid. Its nonsense, not a magic.
The background picture is grayscale, had the cyan grid not been there, the illusion wouldn't work
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