Question

Why did the blood red in color​

Answer 1

Answer:

However, the color of our blood is basically because of red blood cells. Each of the red blood cells contains hemoglobin. Hemoglobin is an iron rich protein. When hemoglobin binds with oxygen, the interaction between them gives our blood its red color.

Answer 2

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This isn't because it isn't really red, but rather because its redness is a macroscopic feature. Human blood is red because hemoglobin, which is carried in the blood and functions to transport oxygen, is iron-rich and red in color. It's bright red when the arteries carry it in its oxygen-rich state throughout the body.

Hope it helps you