Challenging yourself to optical illusions is great way to keep your brain active as you have to work hard to spot the hidden image or bust the riddle. Nothing beats the satisfying moment you finally crack one, but it takes a lot of effort to get there.
These tricky teasers are quite addictive as they challenge your sense of perception and force you to really stretch your mind.
Many of us will remember that infamous blue and black dress which nobody could guess the colour of, leaving the internet in a frenzy. More recently there was a mind-boggling illusion where cars on a road appeared to be different sizes - only for them to be the exact same dimensions.
But this new brainteaser tests something a bit different as it challenges how you see colours.
This one is a challenge of how you see colours (iCompario)With many drivers making the mistake of putting the wrong fuel in their car each year, the business comparison website iCompario have unveiled a new optical illusion to test how your brain spots different coloured fuel pumps.
Mind-bending optical illusion makes your brain 'adjust' after 10 seconds
The illusion shows five different columns of fuel pumps, and each of the those across the top line are clearly a different colour. There is a red, black, green, blue and yellow pump.
Below each of those are three other fuel pumps which appear to be very different in colour to the one at the top.
But, it is just the presence of lines running across the page which change the hues of colour in the fuel pumps.
Those in the other rows are actually exactly the same - the only different colours are just those at the top of the image.
The way in which the colours are perceived depends on the colour used on the lines around the image - a red line gives the fuel pump a different perceived hue, for example.
This can lead our brain to perceive some fascinating colour changes, which are not there. It also explains why some of them appear to be darker or lighter than the top column.
Kerry Fawcett, digital director at iCompario, said: "People resonate colours to the type of fuel they should put in their vehicle, we have created an optical illusion which tests what fuel pumps people can see.
"This Munker-White optical illusion, runs different coloured lines through images to make people believe the image colour has changed colour or is a different shade. However, it doesn't change the same colour throughout."
The Munker-White illusion highlights that images might appear to be different colours in the presence of coloured lines when, in fact, they are just the same.
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