Is deoxydenated blood really blue in colour?

Question

Is deoxydenated blood really blue in colour?
Why is the veins on our wrists blue?

Answer 1

Well, blood in veins is actually a sort of muddy dark color with
reddish tinge. It is NOT blue. You can draw all the blood from veins
into clear tubes you like (it's done all over the world every day), and
you'll never see a tube of blue blood unless the person has severe
methemoglobinemia (where the iron in blood has been oxidized due to a
metabolic disorder).

Now, blood in veins does look blue when seen through the wall of the
vein. But that's due to the vein wall selectively removing certian hues
from the blood, leaving only the blue tones to see. The vein can be a
lovely blue, but blood taken from a blue vein is NOT blue (it's that
muddy red) and the vein itself, without blood in it, is basically
translucent white. That sounds like a paradox, but isn't. The
appearance of the blue in blood-filled veins is a bit like the orange
you see when you look at a red object though a yellow filter. It
doesn't really exist in either place. It apears only as a result of an
interaction between the two objects.

Answer 2

If you've ever given blood or had a blood sample drawn you've seen deoxygenated blood since it was drawn from a vein, not an artery. It is a deep dark red and it only turns that bright, vivid red when oxygenated.

Answer 3

We did a really neat experiment in college. We put my blood into a glass flask. Then connected the flask to a vacuum pump and vacuumed off the gases down to almost 30 inches mercury and watched the blood through the glass. It turned darker and darker to true black.

Answer 4

purple while oxygenated (i.e. in arteries), darker purple while deoxygenated (i.e. in veins). Blood's color specially comes from the hemoglobin in erythrocytes. Hemoglobin is a purple pigment to blame for transporting oxygen by your physique. This pigment supplies your blood its purple color. some circumstances and ailments would reason the blood to make the floor look blue.

Answer 5

yeah it is a blue green color kinda like tarnished copper

and our vains are that color because they are full of blood wit no oxygen.

vains are on the way back to the lungs to get more oxygen. and the only exeption are capelaries (spelling?) which is where the skin is soo thin that oxygen soaks thru the skin into the blood and makes it red again

Answer 6

Blood is always red. It's bright red when oxygenated and dark red when deoxygenated.

Answer 7

I stand corrected....

Because it is far from the heart.....