You can use laundry detergent, dish soap, baby oil, olive oil, or toothpaste to lift the dye from your skin. Try to find fragrance-free soaps to avoid irritating your skin. If the dye is on your face, use oil or toothpaste first since these are less likely to bother the sensitive skin on your face. Any toothpaste will work, but one with baking soda in it may be more effective at loosening the dye.

Summary:
Get out detergent, oil, or toothpaste.