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I promise the objects in this optical illusion are all the same colour

An optical illusion featuring cats and dogs
(Image credit: via @NovickProf on Twitter)

Ah, optical illusions. There are so many different variations of the mind-bogglers out there in the world, and just when it feels like we have covered every one, a new design emerges that blows our minds. Today's find was spotted on Twitter, and we are totally baffled. 

This furry friend-themed optical illusion (see above) was posted by David Novick and has been attracting some attention online. It looks as though the cats and dogs are different colours, right? Well, look again – they're actually all exactly the same colour. Loving this illusion and want to sink your teeth into some more? Make sure you check out the roundup of our favourite optical illusions

An optical illusion of flowers

Can you believe that all the flowers are the same colour? (Image credit: via @NovickProf on Twitter)

The way the illusions have been designed means that we see the objects as two different colours when actually they are exactly the same. The illusions use a technique called 'assimilation.' According to The Oxford Compendium of Visual Illusions (opens in new tab), assimilation "is the phenomenon in which the perceived colour of a region shifts toward that of its neighbour".

An optical illusion of baseballs

If you look closely you can see that the balls are overlaid with different coloured lines  (Image credit: via @NovickProf on Twitter)

If you look closely at each of these designs, you can see that the objects are overlaid by different coloured lines, which trick our brains into thinking that each is a different colour. This is exactly the same phenomenon used in the incredible optical illusion where it looked as though a black and white photo was in full colour. 

An optical illusion of fruit

The optical illusions use a phenomenon called assimilation  (Image credit: via @NovickProf on Twitter)

If you're sitting there thinking 'my brain is lying to me', then don't worry, we're in the exact same boat. While we sit in a dark room and second guess whether all the colours we've ever seen are just a trick of the eye, why not check out our roundup of the best trompe l'oeil illusions?

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Amelia Bamsey
Staff Writer

Amelia is Creative Bloq’s Staff Writer. After completing a degree in Popular Music and a Master’s in Song Writing, Amelia began designing posters, logos, album covers and websites for musicians. She now enjoys covering a range of topics on Creative Bloq, including posters, optical illusions, logos (she's a particular fan of logo Easter eggs), gaming and illustration. In her free time, she relishes in the likes of art (especially the Pre-Raphaelites), photography and literature. Amelia prides herself on her unorthodox creative methods, her Animal Crossing island and her extensive music library.