Answer;
Hemoglobin
Explanation;
In people with lighter skin, respiratory failure can lead to a change in the color of the skin. the pigmentation factor that is affecting this change is hemoglobin.
-As the blood becomes hypoxic, hemoglobin is carrying less oxygen. This deoxygenated state leads to the condition known as cyanosis, which is a bluish cast to the skin and mucous membranes. Peripheral cyanosis is when there is a bluish discoloration to your hands or feet.
Cyanosis is usually caused by low oxygen levels in the red blood cells or problems getting oxygenated blood to your body.