Dogs are not color blind – they see color, but their chromatic acuity is significantly less than humans’. This is for two reasons: (1) dogs have far fewer cone cells in their retina (cone cells are responsible for seeing color); and (2) dogs are dichromatic (they see only two primary colors – blue and yellow) whereas humans are trichromatic, meaning we see three primary colors – red, blue, and green.
Humans have 7 times higher proportion of cone cells than dogs, meaning that when dogs do see colors, they are pale or faded. However dogs have a much higher concentration of rod cells, responsible for seeing black-and-white, and also much more sensitive in lower light conditions. For that reason, dogs have much better night vision than people. -This statement comes from WikiAnswers. See attached link
Dogs can see in color, however, it is quite different from how we view things. They can see all shades of blue and can even distinguish shades of gray that we can’t. Red, orange, yellow, and green are all colors they can’t distinguish between.
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