When you get a cut your blood usely looks red. but in the inside it could be any color. it could be blue, yellow pink, purple, orange! but there is really no way of figuring out cuz if yo cut someone up there blood would touch the atmosphere it changes to red. i hope this answer help u!
EDIT-
Actually deoxygenated blood is dark red in colour, many maintain that it is blue but this is just a common misconception NOT supported by fact, It is biochemically impossible for haemoglobin to turn blue.
De-oxygenated blood is called "hypoxemic". This may be either because the body is not taking in enough oxygen for some reason, or that the blood is "venous" blood which is returning to the heart. Once passing through the heart, it moves to the lungs where the carbon dioxide passes from the blood into the air sacs of the lungs and then is exhaled from the body, and the blood "picks up" oxygen, sending it out to the body via arteries.
Oxygen-poor blood is dark red; oxygen-rich blood is bright red.
my eyes are
Capillaries change color as they pass by body cells as the blood they contain loses oxygen. Oxygen-rich blood has a brighter color than oxygen-poor blood.
When blood is oxygen-rich, it is bright red. Therefore, when blood is oxygen-poor, it is darker in color. When oxygen-poor blood flows through the lungs from the pulmonary arteries, it gets rid of the carbon dioxide and picks up oxygen, which then becomes oxygen-rich blood with a bright red color.
Venous blood is oxygen poor (in comparison with arterial blood).
Oxygen poor blood
Lungs are pink in color because they are full of oxygen rich blood. Oxygen poor blood, on the other hand, has blue color to it.
poor
no you have oxygen high blood.
The main difference between oxygen-rich and oxygen-poor blood is the amount of oxygen they carry. Oxygen-rich blood, which is red in color, has just picked up oxygen from the lungs and travels to the body tissues to deliver oxygen. Oxygen-poor blood, which is blue in color, has given up its oxygen to the tissues and is returning to the heart and lungs to pick up more oxygen.
The pulmonary artery carries oxygen poor blood and the pulmonary vein carries oxygen rich blood.
If the oxygen-rich blood and the oxygen poor blood mix the amount of oxygen becomes diluted. The cells and tissues need more oxygen than they will get.