FactSentinel

Dogs do not see in black and white. They have color vision, but it is more limited than human color vision. Humans typically have three types of cone cells in the retina, which allow them to distinguish a broad spectrum of colors. Dogs have only two types of cones, making them dichromats. Their vision is roughly comparable to that of a person with red-green color blindness, and they can distinguish shades of blue and yellow fairly well.

The evidence comes from both retinal anatomy and behavioral research. Studies of the canine eye have identified two cone types, one most sensitive to blue-violet wavelengths and another most sensitive to yellow-green wavelengths. Behavioral experiments, including work by Jay Neitz and colleagues in 2013, trained dogs to choose among colored panels to get a reward. The dogs could reliably tell blue from yellow but struggled to tell apart red, orange, and green. This indicates that dogs perceive color, just within a narrower range. Reds and greens likely appear as muted yellowish or brownish tones.

The myth likely persisted because early 20th-century researchers assumed that animals with poor color discrimination saw no color at all, and because dogs rely heavily on smell and motion detection rather than color. Dogs also have fewer cones than humans, so their vision is less sharp and less colorful overall. But fewer colors is not the same as no colors, and modern vision science consistently confirms that dogs see a limited but real color world.