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Have you ever noticed that the veins under the skin look blue or green, while the blood color is red? Seeing this, people often get confused whether blue or green bleeding flows in the veins? The truth is that this is an optical trick, and science is very fun behind it.

The color of blood is always red, whether it is more oxygen (bright red) or low (dark red). But the veins look blue or green under the skin. This is due to light and skin interaction. When the light falls on the skin, it reacts in different ways, which makes the color of the veins changed.

Amazing of light and skin

When sunlight or any white light falls on the skin, it is mixed with many colors, such as red, blue, green. Vavalantha of each color is different. The velvet of red light is long, which goes deep in the skin. But the velvenices of blue and green lights are small, which is not able to go too deep and reflects from the skin. The skin and its bottom fat layer acts like a filter. It absorbs the red light more, and the blue-green light reaches our eyes. Because of this, the veins look blue or green.

Hemoglobin and blood color

The red color of blood is caused by hemoglobin, which is found in red blood cells. This protein carries oxygen and reflects red lights. When oxygen is high in the blood, such as in the arteries, it looks bright red. If oxygen is low in the veins, the blood becomes dark red. But it is never blue or green. Looking blue-green veins is a game of light, skin and veins.

Skin tone roll

The color of the vein also depends on the skin tone. The veins of the light skin look more blue, because their skin absorbs less red light. The veins of the dark skin look green or less clean, as their skin absorbs more light. If the skin is thin or the fat layer is low, the veins look and clear. This is the reason why the veins of children or thin skin are more vicable.

Any connection with health?

It is normal to see blue or green veins in most cases and it has nothing to do with health. But if the veins suddenly start to be very bulging, crooked or painful, then it can be signed by varicose veins or any blood circulation problem. If you see a strange change on Swailing, Pain or Skin, get a doctor checked up. Especially pregnancy or long -standing people may have this problem.