Can Dogs See in Color?
An article by Dave the Dogman.
It is not true that dogs are completely colourblind. While dogs do not have the same color vision
as humans, they are able to tell yellow from blue. Like a human with red-green colourblindness,
they are unable to tell the difference between red and green.
The reason for this limited range, in both the colourblind human and the dog, is that there are
only two kinds of colour receptors in the retinas of their eyes. While most humans have three
kinds of colour cells, with three different receptor molecules sensitive to blue,
greenish-yellow, and red, dogs only have receptors for yellow and greenish-blue. ...
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