Urine held in the bladder for an extended period of time will have more color. Drinking lots of fluids especially water will make urine dilute, or nearly colorless.
I Asked About My Urine Sometimes Being Yellow And Then Being Crystal Clear. But The Answer I Got Did Not Help?
I was always told that the color or lack of it was unimportant, it can change with many factors, including diet... The only time to be concerned is if urine is cloudy, usually indicating insufficient water intake...My urine is sometimes clear, also, never had any problems and I am almost 70.