Urine color is affected by many things within the body. For instance, a darker color can mean a person is dehydrated because there are more nutrients in the urine and less water. Conversely, very pale urine is full of water, so it's likely the person is well hydrated. Also, urine can indicate that you have too many or too few nutrients, as in vitamins and minerals in your system. I know when I take my daily supplements, which are chock-full of water-soluble vitamins, I pee florescent yellow. It's pretty unnerving. Also, colors in your food can affect it, like urine is often pink after you eat beets. However reddish urine might be bloody, and should be checked by a doctor promptly. Hope that long-winded answer helped!