Skin color changes
Blue or gray fingers and toes could be from poor circulation of oxygen-rich blood, often due to a heart defect you were born with or narrowed or blocked blood vessels. A lacy, mottled, purple pattern shows up when bits of built-up cholesterol plaques break off, then get stuck in small blood vessels. You might get bloody splotches just under the skin on the inside of your hands and the soles of your feet when you have endocarditis.