It’s a condition that affects around 3 million people across the UK, yet many people don’t know that they’re colour-blind.
Colour Blind Awareness Day, and to celebrate, Optical Express has revealed three images, called Ishihara plates.
The images have the faces of famous people hidden in them – and if you can’t see the celebrities, you might be colour-blind.
Scroll down to find out who the famous faces really are!
Stephen Hannan, Clinical Services Director at Optical Express, said: “We want to raise awareness of this condition as, even though it is physically harmless, sufferers can feel stigmatised.
“Talking about it with a fun yet informative Ishihara test helps to remove this stigma and provides more information which will help those who struggle to distinguish between certain colours lead a normal and unrestricted life.”
Colour blindness comes in several different forms, and affects your ability to distinguish between red and green, and blue and yellow.
Other colours can also appear much duller than they would for people with normal vision.
Thankfully, if you have the condition, it’s unlikely to affect your every day life.
The NHS explained: “Most people are able to adapt to colour vision deficiency and it’s rarely a sign of anything serious.”
The famous faces are Bill Clinton, Prince William and Bono.