“Dogs only see in black and white.”

Many people have long believed that our canine companions experience the world in a grayscale palette, devoid of vibrant hues. This widespread misconception, however, is far from the truth. The idea that dogs see only in black and white likely gained traction in the early to mid-20th century, possibly stemming from early scientific theories about animal vision or simply a lack of definitive research at the time. Some sources suggest that a prominent 1930s dog trainer, Will Judy, may have contributed to popularizing this belief by stating that dogs saw only in shades of black and white and gray, a notion that unfortunately stuck in the public consciousness.

Scientific research has since definitively busted this myth. Dogs possess dichromatic vision, meaning their eyes have two types of cone cells responsible for color perception, unlike humans who typically have three. This allows them to primarily perceive colors in the blue and yellow spectrums, along with combinations of these. What humans perceive as red and green, dogs would likely see as varying shades of yellow, blue, or gray. Their color vision is often compared to that of a person with red-green color blindness, demonstrating a limited but certainly not absent, ability to distinguish colors.

The persistence of this myth can be attributed to several factors. For one, the concept of animal vision was not as thoroughly understood or widely communicated in the past, allowing simpler, less accurate explanations to take root. Additionally, because dogs can navigate and interact with their environment perfectly well, people might have assumed that color vision wasn't essential for them, leading to the conclusion that they simply didn't possess it. However, modern studies using behavioral tests and electroretinography have provided clear evidence of their ability to differentiate between various colors, proving that their world is indeed more colorful than once imagined.