Grey? Blue? Purple? It can look different, depending on the context. Let's talk about color perception, color temperature, and the history of laundry.
Atmospheric opacity image from ESA/Hubble (F. Granato): [ Ссылка ] - image licensed under CC by 4.0 - [ Ссылка ]
The optical illusion is original, but based on the work of David Novick: [ Ссылка ]
More on Illuminant D65: [ Ссылка ] - the references in this article go into the full technical detail
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