Urine Color and Hydration: What Your Pee Color Means

Pale, straw-yellow pee usually means you're drinking enough, while dark yellow, strong-smelling pee is a sign that you need more fluids. Color is a handy everyday check, but vitamins, foods and medicines can change it too. Some colors, such as red, pink or dark brown that you can't explain, are worth getting checked by a doctor.

What color should your pee be?

MedlinePlus, the US National Library of Medicine's health site, describes normal urine as straw-yellow. The NHS puts the goal simply: "Most people should aim to drink enough during the day so their pee is a clear pale yellow colour." The CDC uses the same check in its hot-weather advice: "When it's light yellow or clear, it usually means you are drinking enough water."

Notice the word "usually." Color is a quick signal, not a measurement, and it's easier to read once you know what else can change it.

Dark yellow pee and dehydration

The NHS lists "dark yellow, strong-smelling pee" among the signs of dehydration, along with peeing less often than usual, feeling thirsty, a dry mouth, a headache and tiredness. If your pee is darker than usual, think about the day you've had. Hot weather, a long workout or a stomach bug with vomiting or diarrhea can all leave you short of fluid.

When you do have signs of dehydration, the NHS advice is to drink fluids, starting with small sips if you feel nauseous. Then watch whether your pee gets paler. The NHS lists dark yellow pee, or peeing less than normal, among the reasons to ask for an urgent appointment with your doctor or contact NHS 111, its urgent advice line; outside the UK, use your local urgent advice service.

For the full list of symptoms, including the signs in babies and when to get urgent help, see signs of dehydration.

Urine color chart: what can change the color

MedlinePlus notes that "abnormal urine color may be caused by infection, disease, medicines, or food you eat." This table brings together what MedlinePlus, the NHS and the CDC say about each color.

Color	What can cause it	What to do
Pale yellow or clear	Usually means you're drinking enough	Nothing: this is the aim
Dark yellow or orange	Not drinking enough (dark yellow); B complex vitamins or carotene; some medicines, such as phenazopyridine, rifampin and warfarin; recent laxative use	Drink more if you might be dehydrated; see a doctor if the color can't be explained and doesn't go away
Pink, red or light brown	Beets, blackberries, food coloring, some medicines, or blood in the urinary tract	Get blood in your pee checked, even once; see a doctor if the color isn't explained by a food or medicine
Dark brown but not cloudy	Severe dehydration, liver problems, or a muscle condition called rhabdomyolysis	See a doctor
Green or blue	Dyes, some medicines (such as methylene blue), or a urinary infection	See a doctor if it can't be explained and doesn't go away
Cloudy or milky	Can be a sign of a urinary tract infection	See a doctor if it doesn't go away

Foods, vitamins and medicines

Plenty of color changes have nothing to do with how much you drink. The NHS points out that eating beets can turn your pee pink, and that some medicines can turn it red or brown. MedlinePlus lists B complex vitamins and carotene among the causes of dark yellow or orange urine.

If you've just started a new supplement or medicine and your pee changes color, check the leaflet or ask a pharmacist whether that's expected.

When to see a doctor about urine color

MedlinePlus and the NHS say to see a doctor or other health care provider for:

blood in your pee, even once
pink, red or smoky-brown pee that isn't explained by a food or medicine
dark-brown pee that is not cloudy
an unusual color that you can't explain and that doesn't go away

The NHS adds that blood can make pee bright pink, red or dark brown, and that you should get it checked even if there's only a small amount or you're not sure it's blood.

The limits of the color check

Pee color is useful, but it has blind spots.

Supplements and medicines can change the color, so it can mislead you if you take them.
It's a rough guide. The CDC says light yellow or clear "usually" means you're drinking enough, not always.
You don't need to chase perfectly clear. Pale yellow is the aim the NHS describes. Drinking far more than you need isn't harmless either: healthy kidneys can clear at most about 0.7 to 1.0 liters (about 24 to 34 fl oz) of water an hour, according to the National Academies, and drinking large amounts much faster than that has caused water intoxication. Read more in can you drink too much water.
A fluid limit comes first. If a doctor has told you to limit fluids (for example for heart failure or kidney disease), follow their limit rather than general advice or a particular pee color.

If your pee is often dark, try noting what you drink for a few days, on paper or in an app such as Hydrolotl, to see whether you're drinking less than you thought. For a sense of typical daily amounts, see how much water should you drink a day.

FAQ

What color is urine when you're dehydrated?

Dark yellow and often strong-smelling, according to the NHS. You may also be peeing less often than usual.

Is clear urine good?

The CDC says light yellow or clear usually means you're drinking enough, and the NHS suggests aiming for a clear, pale yellow. There's no need to drink extra just to make it completely colorless.

Can vitamins change the color of your urine?

Yes. MedlinePlus lists B complex vitamins and carotene among the causes of dark yellow or orange urine, and some medicines can change the color too.

When should I worry about my urine color?

See a doctor for blood in your pee, even once; for pink, red or smoky-brown pee not explained by a food or medicine; for dark-brown pee that is not cloudy; or for an unusual color you can't explain that doesn't go away.

Sources

This article is general information, not medical advice. If you have a health condition or your doctor has given you a fluid limit, follow their advice.