Is it true that blood inside your body before it touches oxygen, is blue

I truly can't believe we have blue blood

You have 2 different blood vessels inside your body that circulate the blood. #1 is the arteries,the vessels that have a "pulse"( check inside your wrist below your thumb) these vessels carry oxygenated blood throughout your body,under pressure,that's what is called the "blood pressure".That blood is bright "cardinal" red,from the oxygen percent. #2 are the veins,they carry blood back to the heart and lungs so the blood can exchange carbon dioxide for oxygen,we breath this by- product out of our body when we exhale the air in our lungs.These vessels carry the darker blood is a dark "reddish purple" color,because the oxygen depletion,the "veins" also do not "pulse" because its not under allot of pressure etc. You don't have "blue" blood,that's a very old term that was used to describe sick babies with heart defects etc. Take care. SW FNP

It's blue if you're an octopus or squid. If you're human, then it is always some shade of red.

Blood in the veins is usually about 75% oxygenated, and that in the arteries is 95-100% oxygenated. Arterial blood is brighter red because of that.

Veins appear blue because the overlying tissue bends the light and makes them look blue or purple in some people), like the atmosphere bends the light to make the sky look blue.

This question has been asked and answered many, many times here.

Wow, I can't believe people think that the veins are blue from blood, when drained and removed from the body they are blue. Ever have a blood draw into a test tube at the clinic? The tube has a vacuum inside therefore the blood doesn't come in contact with air and it is always dark red unless you have an arterial draw then it is bright red from the high O2 saturation. No, blood is always a variation of red.