This image is black and white.... right?
If you haven't already guessed, the red spoon is number four in our line-up. And if you’re thinking, ‘but number four seems too dark to be red’, then we might have an explanation for you. According to, what we are seeing here is the Purkinje shift, which means that colours with larger wavelengths, like the colour red, will appear darker in black-and-white photos . has racked up a hefty 7.
If you flopped at this challenge and wanted to brush up on your colour knowledge, then you'll love our guide to
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