what cloor is our blood?  red or blue?
539773
No, this is a very common myth. Blood is always red. When in an oxygen poor stage it assumes a red color that is not as intense as the red of the oxygen rich stage. The blue color comes from looking at your deoxygenated blood through layers of skin as well as the veins.
60350
I have looked and seen.\nThe blood of most animals you are familiar with is red.\n\nYou are most familiar with oxygenated blood which is bright red. When you cut yourself the blood that leaks out is in contact with oxygen in the air and becomes oxygenated.\n\nDeoxygenated blood is a darker red.\nThe deoxygenated blood in veins is NOT visible just by looking at your skin. What you are seeing is the colour of deoxygenated blood viewed through the layers of tissue of the vein walls.\n\n'Blue blood' does not exist except for convenience in diagrams to distinguish it from the oxygenated blood in other parts of the diagram. The other common misconception is the use of 'blue blood' to describe aristocracy - cut of their heads and there is lots of bright red blood!\n\nHOWEVER - there ARE some animals (but none you are likely to have heard of) that do have blue blood - the oxygen is carried on copper rather than on iron.
996461
Believe it or not it is blue while it is still in our bodies. You can tell by looking at a place in your body where the skin is thin like the inside of your arm or on your inner wrist. Where there is a blood vessel there is a blue line. Then once the blood gets exposed to oxygen it turns red.
637537
It's actually a bluish-green.  Look at your veins that come to the surface of your skin.  Blood only turns red when it comes into contact with oxygen.
172271
Red because it can represent so many things. Love, passion, anger, chaos etc.
731030
De-oxygenated blood is blueish. THe blood inside your veins, if you could somehow look at it without exposing it to oxygen, would appear blue. It's isn't as if the walls of your veins are one color and the blood inside is a different color.
894834
To differentiate it from red which is called red.\n(joke couldn't resist)\nI think there is no reason for the word blue except whoever was in charge of naming words named it blue.\nDo you like it?\nThere was a game book where they made up a condition of life and then named it.Very funny and we who read  it could relate.  For instance a person who likes to practice outer body experience just before he has sex might be called........voyeur. or  retroactive.\nSo you might try this yourself. when intrigued by a certain condition of life.
158835
I like blue better.  Red tends to make me tense or mad, a red car is also more likely to be stopped by the police than a blue car....
117755
Actually blood would be red, the bluish appearence on Earth is a bit of an illusion with the nature of the veins (i forget the details).\n\nSo, the blood would be red, I would think.
238331
there is no specific meaning; just use what makes sense for you. Red can mean urgent, and blue can mean "follow up on tuesday." It's all up to you.
1104888
In humans and other hemoglobin-using creatures, oxygenated blood is a bright red in its color. This is due to oxygenated iron in the red blood cells. Deoxygenated blood is a darker shade of red, which can be seen during blood donation and when venous blood samples are taken. However, due to an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in color. This has led to a common misconception that before venous blood is exposed to air it is blue.\n\nread more at\nhttp://en.wikipedia.org/wiki/Blood\n\n-unpredicktaboh-
186648
red: courage\nblue: justice\nwhite: innocence
228915
Lobster Blood is transparent or white, but because Copper is used to transport oxygen around their bodies (whereas humans use Iron), oxygenated blood is slighty blue.
284453
Red blood cells are red only because they contain a protein chemical called hemoglobin which is bright red in color. Hemoglobin contains the element Iron, making it an excellent vehicle for transporting oxygen and carbon dioxide. As blood passes through the lungs, oxygen molecules attach to the hemoglobin. As the blood passes through the body's tissue, the hemoglobin releases the oxygen to the cells. The empty hemoglobin molecules then bond with the tissue's carbon dioxide or other waste gases, transporting it away.
612119
blood is red...not black
228065
Look down there..\nThe *.pdf is most detailed and informative.\n\nI am stunned at the total lack of sense displayed by some of these answers! Blood is red! Oxygen poor blood is more 'purpley' in colour but not blue. NONE OF THE BLOOD CIRCULATING INSIDE YOUR BODY IS BLUE!!!
622473
Red, because it is a live color. Outgoing!