Mine is yellow due to not drinking enough!
The 1st pee of the day is dark and mayB smelly
As we get into the day urine should lighten to straw - any lighter and one is drinking too much
We get liquid from our overall diet plus what we drink: tea, coffee, milk .......
The idea is apparently drink B4 one feels thirsty

Think about your over all diet and any meds you are taking.