That is called hemoglobin. Hemoglobin contains iron, and when iron oxidizes (rusts), it turns orange.
The color of a red blood cell is dark red when it is deoxygenated.
Red blood cells contain a protein called hemoglobin, which is responsible for carrying oxygen from the lungs to the rest of the body. Hemoglobin binds to oxygen in the lungs, giving red blood cells their red color.
Hemoglobin is the iron oxygen carrying protein which gives blood its red color
Reduced hemoglobin gives blood its red color. When oxygen binds to hemoglobin, it becomes oxyhemoglobin, which is bright red. Without oxygen, hemoglobin reverts back to reduced hemoglobin, which is darker and gives blood a deeper red hue.
Plants get their green color from a pigment called chlorophyll, which is essential for photosynthesis. Other pigments, such as carotenoids (orange and yellow) and anthocyanins (red and purple), contribute to the different colors seen in flowers and fruits.
Hemoglobin
Hemoglobin is the part of a red blood cell that gives it the red color and carries oxygen. Hemoglobin is a protein that binds to oxygen in the lungs and releases it to tissues throughout the body.
Hemoglobin
Lycopene is the chemical that gives them their red color.
The color of a red blood cell is dark red when it is deoxygenated.
Europium
Red blood cells contain a protein called hemoglobin, which is responsible for carrying oxygen from the lungs to the rest of the body. Hemoglobin binds to oxygen in the lungs, giving red blood cells their red color.
Hemoglobin
red and green
The iron in the soil on Mars gives the planet its red color.
The red blood cell give it's color
The color of a red blood cell changes depending on whether its hemoglobin is carrying oxygen. Oxygenated red blood cells are brighter in color.