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.
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.
Venous blood is oxygen poor (in comparison with arterial 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.
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 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.
The right chambers have oxygen poor blood. The right atrium receives oxygen-poor blood from the body circulation, and the right ventricle pumps it to the lungs.