MYTH.
The idea that dogs see in black and white is one of the most confidently repeated facts in pet ownership. It is also wrong, and has been officially wrong since 1989 — which means it has persisted for over three decades after being debunked, passed from parent to child like a treasured piece of misinformation.
Dogs are not colorblind in the black-and-white sense. They have two types of cone cells in their eyes — humans have three — which means they can distinguish colors, just not all of them.Scientific American reportsthat ophthalmologist Jay Neitz confirmed in 1989 that dogs can see blue and yellow but not red or green. Their vision is most similar to a human with red-green color blindness: a world that is not monochrome, but muted — blues and yellows vivid, reds and greens collapsing into muddy browns and grays.
The myth was popularized in the 1940s by an optometrist named Gordon Walls, who claimed in an influential book that dogs could only weakly perceive color, if at all.The claim spread unchallenged for decades because the tools to properly test canine color vision didn't yet exist. By the time the science caught up, the myth had been repeated so many times it had calcified into fact.
The practical upshot is worth knowing: that red ball you've been throwing for your dog on green grass?The AKC notesit likely looks brown to them, blending into the background. Blue and yellow toys are what your dog can actually track. The tennis ball's yellow fuzz is not an accident.
Your dog's world isn't black and white. It's just missing a couple of colors you take for granted.
Dogs are not colorblind in the black-and-white sense. They have two types of cone cells in their eyes — humans have three — which means they can distinguish colors, just not all of them.Scientific American reportsthat ophthalmologist Jay Neitz confirmed in 1989 that dogs can see blue and yellow but not red or green. Their vision is most similar to a human with red-green color blindness: a world that is not monochrome, but muted — blues and yellows vivid, reds and greens collapsing into muddy browns and grays.
The myth was popularized in the 1940s by an optometrist named Gordon Walls, who claimed in an influential book that dogs could only weakly perceive color, if at all.The claim spread unchallenged for decades because the tools to properly test canine color vision didn't yet exist. By the time the science caught up, the myth had been repeated so many times it had calcified into fact.
The practical upshot is worth knowing: that red ball you've been throwing for your dog on green grass?The AKC notesit likely looks brown to them, blending into the background. Blue and yellow toys are what your dog can actually track. The tennis ball's yellow fuzz is not an accident.
Your dog's world isn't black and white. It's just missing a couple of colors you take for granted.
