The baby's urine should be clear as water after the first few days, though an occasional darker urine is not of concern. (motherandchildhealth.com)
This turned out to not be true as well, because dark urine doesn't just depend on water — it depends on a number of other influences as well! (fitnessandpower.com)
Dark urine means that your kidney is retaining liquids in order for your body to perform its normal functions. (articles.mercola.com)