What color blood indicates arterial bleeding?

Bright red blood indicates arterial bleeding because it is oxygen-rich, having just been pumped from the heart through the arteries to deliver oxygen to the body. The bright red color is a result of the high levels of oxygen bound to hemoglobin, which gives arterial blood its characteristic vibrant hue. This is in contrast to venous blood, which tends to be darker due to a lower oxygen content and the higher presence of carbon dioxide. When assessing bleeding, the color of the blood can provide immediate clues about the type of vessel involved and the urgency of the situation.