Span classnews_dtmar 06 2010spannbsp018332dogs are redgreen colorblind they do not see the same spectrum of color we do however they do see more than black and white the reason is dogs have less cones than we do cones are color receptors in the eyes they have more rods than we do which are light sensors so dogs have better vision in lowlight but we have.
dogs see shades of blue yellow and green which when combined can be perceived as grayish brown dark yellow light yellow grayish yellow light blue and dark blue this probably explains why dogs love chasing a bright yellow tennis ball on the green grass under the blue sky.
Span classnews_dtmar 01 2008spannbsp018332dogs do have some color vision but not as much as humans dogs have a particular form of colorblindness called deuteranopia they can see gray violet blue and colors in the yellowgreen genre.
Dogs have just onetenth the concentration of colorcapturing cones in the back of their eyes that humans have so while we enjoy a smorgasbord of tinges and tones dogs only see two colors blueviolet and yellow as well as any blends of these colors.
Most people believe that dogs see in shades of black and white and are unable to see any colors at all but that is simply not true so whats the truth do dogs see in color or not dogs are in fact able to see colors.
Just because dogs dont appreciate the entire spectrum of color that humans do that doesnt mean they dont perceive different colors they just may not see the true color of an object for example the color red appears dark brownishgray or black to a dog and yellow orange and green all look a bit yellowish to a dog.
This is the belief that dogs only see in black and white while their color vision is somewhat limited and different than ours they do see color and a look at the world through a dogs eyes can provide insight into how they perceive the world.
Dogs are partially colorblind and so are cats but contrary to what some people think they do see some colors not just shades of black and white paulette clancy of cornell university points out that many people are of the misguided opinion that dogs and cats cant see any colors and only view everything in gray tones thats a myth.