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 yellow.

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, which are 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.
Well actually dog aren't color blind... they can see colors like grey, black, and white, etc. so they are down the middle of blind and not blind. They can only see dark colors.

Have a good day :)
Actually, some dogs can see some colors, like blues or greens. Scientists are still trying to figure out what can and cannot be seen. But, most dogs can see some color, but mainly black and white.
not really they can see colors like us. only dogs have hard time seeing colors that are simaliar in looks like red and orange. sometimes they see colors darker or lighter in color. Some dogs have eye vision that can only see black and white
It is a common misconception that dogs see only in black and white. Cone photoreceptors are the cells in the retina responsible for color vision. They are present in dog and cat retinas. Although dogs and cats do have some color vision, there are species differences in color vision. Humans with normal vision have 3 types of cones. Dogs and cats have only 2 types of cones so they do not experience the same spectrum of color vision that we do. Color vision in dogs and cats is called dichromatic versus trichromatic color vision in people. It is thought that dogs can see blues and yellows the best and that they can distinguish reds from blues but that they have difficulty distinguishing reds from green. They are considered similar to red-green color-blind humans.

Of course, this is what we THINK... Until we find a way to actually communicate with them, we won't be able to ask them to find out for sure.

They are, however, predators so they need color to see prey and potential danger.
Nobody can tell for 100%... you can have one scientist saying yes they are and one that says no they aren't. :( it bugs me too. Scientist are trying to figure it out but still nobody knows fro sure! :(

Some animals are color blind... Just some can see some certain colors, like a horse can see blue's and greens, deer can see yellows and greens..etc...

Dogs most definitely are not color blind. There are some differences in their vison from that of humans, but -- contrary to popular myth, their eyes contain both rods (cells that detect light and movement but not color) and cones (which detect color and need more light than rods do in order to activate).

Rods are groups of light sensors connected to one neuron. Cones, on the other hand, are one neuron per cone and, unlike rods, have a narrow range of wavelengths they'll respond to. Dogs' cones respond to, what in the human range of vision, would be yellow, and blue-indigo.

Most breeds of dogs also do not resolve images well at distance, with a focal range of about 20/70 (to a human's healthy vision of 20/20). This means, what you see at 75' is about what a dog sees at 20' (exceptions are Labrador Retrievers, who approach 20/20 -- which is why they're often used as guide dogs).

Dogs also have a wider angle of acceptance -- around 270 degrees (as opposed to a human's 180 degrees). This means they are more aware of events on the periphery of human sight of course, but as the acceptance angles of vision of the two eyes don't intersect as completely as humans, they don't get really good distance ranging except for a small angle of acceptance directly in front of them.

You can pretty easily test this if your dog likes retrieving. Get a bunch of identical balls in different colors, and watch for the surprisingly different reactions.

CLARIFICATION: TURTLES ARE NOT COLOR BLIND!

Source: Turtles, Tortoises and Terrapins: Survivors in Armor by Ronald Orenstein.

At least some turtles can see in the red-orange-yellow part of the spectrum...box turtles (for example) like to eat berries, and the color vision can help them spot the ripening fruit.

and bees.

Birds are not color blind because you can teach a parrot to recognize colors. This is also true in a peacock's colorful wings.

Good point! While dogs have only two types of cones (see above about cones and rods) that detect yellow and blue-indigo, and humans have 3 (Cyan, Magenta, Green or Red/Yellow/Blue), birds have four, with the ability to see into the ultraviolet as well.

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Pure white, shorthaired cats with two blue eyes are often deaf (not blind!)

Pure white, Persian longhaired cats, are color blind.

One in four human males has a form of colorblindness, with differing levels of severity, or acuteness.

Deer are color blind. This is why hunters where blaze orange. It stands out for the hunters, but isn't noticeable for the hunted.

In fact, very few if any animals perceive only in monochrome or gray-scale. Barring extreme neuro-trauma, humans never do. Even in cases where severe brain injuries plays a part, the most extreme case I've seen documented (Sax et al, "Anthropologist on Mars") was an artist who, after a severely neuro-traumatic event, could only see in gray-scale and in a very narrow frequency span in the yellow-orange region....

Domestic Ferrets see in shades or tones of gray and can see some red

You can't describe it. The color pink is strictly visual - it is a light of varying wavelengths and frequencies. Just like you couldn't answer what pink sounds like; the color pink will always remain foreign to a blind person.

That is a beautiful question you have. Pink is the soft pillow you felt as a baby or the soothing voice of your mother. You could also describe pink using the sense of taste, such as bubble gum flavored ice cream.

I also think that is an excellent question. Pink is the way you feel when you love someone. Pink is the way you feel when you touch a flower in April. Pink is the way a lollipop tastes on the tip of your tongue.

• Remember- this person is only blind when it comes to sight, he or she is not blind when it comes to feeling.

The best way to allow a blind person to experience pink is through their sense of smell and touch. Let them smell a rose. Let them feel the petals on the rose, which are tender like a baby's hand.

Pink is a softer version of red.

Blue rather than green is the colour associated with St. Patrick and some flags were "St. Patrick Blue" in colour.

Also the Irish flag that still appears on the English Royal Family's coat of arms is navy blue with a gold harp.

It can be seen on photos of Princess Diana's casket if you're curious as to what it looks like.

In response to Claire that's a Leinster flag not an Irish one

Note - That is actually the Irish crest on Diana's coffin and not actually the Lenister Flag. This crest is now used by the President of Ireland.

Hi, I'm born and bred in Ireland so I'm positive that blue not only was once the official colour of Ireland but still is. As a result it is the colour of the carpet in the Dail (pronounced 'Dawl') which is the Irish seat of government.

Answer

There is no official colour of Ireland as such. However, St Patrick's Blue and Presidential Blue are the colours that the Government of Ireland use for their day to day business. You will see the two different blues in the Dublin County football colours and on the old Aer Lingus liveries. The light blue is the St. Patrick's Blue, the dark one is the Presidential Blue which appears in the Irish crest. Dark blue with a gold bardic harp. Green is only a customary colour and cannot and should not ever be considered as the official colour. The previous answer is quite correct about the Dáil using these colours in the carpet. There are various examples of this blue being used in many official Irish Government buildings and meetings. Have a look the next time you visit an Irish Embassy to see what colours are on display.

Updated Answer:

Actually, blue has been the national colour of Ireland since the 12th century.

Here are opinions and answers from WikiAnswers Contributors:

• Here's a toughie...Firstly, i think it depends on the person. If a person is old enough, it may occur as black and white. Otherwise though, I'm pretty sure it's mostly color dreams.
• People dream in color, even when they think that they dream in black and white... if you ask them what color something was, they will know.
• No, I don't dream in color and I am normal - as normal as possible.
• Same for me. Sometimes I dream in color, but very often, I have a dream or two in black & white or sepia. And I'm still in middle school, so I don't think you'd consider me "old!"
• Everyone dreams in color. The thought that we don't dream in color is the result of misinterpretation of very old research. Think about it: We see in color. In fact, we have six senses at our disposal during the waking day. There's no reason we wouldn't have access to those senses during sleep as well, particularly since many scientists believe dreaming is a natural way to recall events and emotions from our waking hours and play out solutions as a means of catharisis.
• I should add that some people dream much more vividly than others. Those who don't recall dreams at all or very well may be lead to believe they don't dream in color.
• Humans actually have five senses. Some have fewer -- for example, blind people only have four. People who are blind due to the failure of brain regions devoted to vision do not dream in vision at all. Their brain is unable to create or process visual images. Thus, congenital blind people are indeed unable to dream in color, or in vision at all. It should also be noted that this kind of dream research can only be based on reports from individual.. even if some people do say that they dream in black-and-white, we may never know if that's true, or if they just are unable to remember their dreams vividly enough.
• No. I dream in color and in black and white. My step father only dreams in black and white and my mother only dreams in color.
• No one would probably have dreamt of this question if we never had colour tv. As it is, I seriously doubt that anyone who isn't colour blind or has some similar visual disorder, dreams in black and white.
• This answer really depnds on the person and the circumstanses. Everybody has different ways of dreaming, so many people would have their dreams set in different times (eg. daytime or night time). This may effect the colour they see. Obviously dreams which are set in the night time will be drained of much colour and may be interpreted as 'black & white' dreams. From my experience, dreams of which are set during the night time tend to be black and white as that is all I can make out of colour in the dark.
• i always dream in color or the dreams i remember are always in color.
• I read a book about dreams. It's called: Book of Dreams By Sylvia Browne. The color dream is a prophetic dream. Prophetic dreams are always in color! They tell the future. But they only give you hints!
• Who knows if you dream in color or not? When you remember the dream, you are more likely to remember it in color, since your daylight vision is in color. If you claim to dream in black and white, the chances are you just dreamt a dark dream.
• Mostly dreams occur in different colours it need not be black and white only sometimes people dream in single colour like red,blue and green but it depends on how the person want to see the brain doesn't rest at all that is why dreams occur so as we think inturn the brain thinks and manipulates and gives it in the form of dreamz...
• I am color blind, my brother is blind, we both dream in color.

It is appealing

Red is an appealing colour. It is eyecatching, and possibly makes you think of apples. Does some muddy brown colour make you want to eat? No, probably not. Red is much nicer, and generally not associated with something gross.

Try it out!

Have you tried eating blue colored rice? I did, and my appetite just vanished completely. I couldn't! Same with a blue cake. I baked it for class, but no one ate it. When you try this, make red and yellow colored rice too.