Final answer:
Poorly oxygenated blood in the dermis causes a blue tint to the skin known as cyanosis, which occurs when blood oxygen levels are low and has no relation to skin pigmentation.
Step-by-step explanation:
Poorly oxygenated blood in the dermis will cause an individual to exhibit a blue skin coloration, a condition referred to as cyanosis. This condition happens when the oxygen supply is restricted, for example, during an asthma attack or heart attack.
As a result, dark red deoxyhemoglobin becomes dominant in the blood since it's not carrying as much oxygen, and this leads to the skin taking on a blue hue. It's important to note that in such cases the effect on skin color is not related to the skin's pigmentation, but rather to the oxygenation of the blood.