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Dark Urine: What Dark Yellow, Orange or Brown Urine Means and What Test Tells You

Dark yellow or amber urine is usually concentrated urine from too little fluid. Brown, tea or cola-colored urine is different: it can come from bilirubin, blood or muscle protein. Learn how to tell them apart, which urinalysis lines and blood tests separate the causes, and when to get prompt care.

Published

November 2, 2026

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13 min read

Medically reviewed by

Rhonda Collins, FNP-C

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Dark yellow or amber urine usually means your urine is concentrated, most often because you have not had enough fluid. Brown, tea or cola-colored urine is different: it can come from bilirubin when the liver or bile ducts are affected, from blood, or from muscle protein released after muscle damage ^[1][2][3]. Some foods and vitamins can darken urine too ^[1][2].

A urinalysis is the test that tells these apart. Specific gravity shows how concentrated the urine is, the bilirubin line points to the liver, and the blood line, read with the red blood cell count, separates bleeding from hemoglobin or myoglobin ^[2][4][5]. A liver function panel or a creatine kinase (CK) blood test then confirms the likely source.

What gives urine its color

Urine gets its yellow color from urochrome, a pigment made from the breakdown of hemoglobin ^[2]. The usual color is straw-yellow ^[1], and normal urine ranges from almost colorless to dark yellow ^[12]. The less water in the urine, the more concentrated the pigment and the darker the color.

Urine color tracks concentration closely enough to use as a rough guide. In three studies of hydration, urine color was strongly correlated with urine specific gravity and urine osmolality, the two laboratory measures of concentration. The authors concluded that color is fine for close estimates but not where precision matters ^[17]. That is why a lab measures specific gravity rather than relying on color.

For the reference page on this result line, see urine color.

Dark yellow or amber urine: concentration and dehydration

Dark yellow urine is most often concentrated urine. Darker yellow urine is one of the signs of mild to moderate dehydration, and very dark yellow or amber urine is one of the signs of severe dehydration ^[3].

Other signs of mild to moderate dehydration include thirst, a dry or sticky mouth, not urinating much, headache and muscle cramps ^[3]. You can lose more fluid than usual from heavy sweating, for example when exercising in hot weather, and from fever, vomiting or diarrhea ^[3]. Concentrated urine can also smell stronger, which does not by itself mean an infection ^[5].

On a urinalysis, concentration shows up as specific gravity. The normal range is 1.005 to 1.030 ^[4]. A value near 1.010 suggests normal hydration, and a value above 1.020 may indicate dehydration ^[2]. Dark yellow urine with a high specific gravity and nothing else abnormal on the report fits concentrated urine.

The usual fix is more fluid. MedlinePlus suggests drinking plenty of fluids every day, and more when the weather is hot or you are exercising ^[3]. If urine stays dark once you are drinking normally, concentration is no longer the likely explanation. MedlinePlus advises seeing a provider for abnormal urine color that cannot be explained and does not go away ^[1].

Dark orange urine

Dark yellow or orange urine can come from B complex vitamins or carotene, from recent laxative use, or from certain medicines ^[1]. Carrots are a food cause of orange urine ^[2].

Orange can also come from bile pigments, the same pigments that turn urine brown in liver and bile duct problems ^[2][5]. Orange urine that is not explained by a vitamin, a food or a medicine, especially with yellow skin or eyes or pale stools, belongs with the liver causes below.

Brown, tea or cola-colored urine

Brown, tea or cola-colored urine has three main medical causes: bilirubin from a liver or bile duct problem, blood, and myoglobin from muscle breakdown ^[1][2][5]. These do not come from too little water alone, though severe dehydration can also make urine dark brown ^[1].

Liver and bile ducts: bilirubin

Bilirubin is a yellow substance made when red blood cells break down, and a healthy liver clears most of it into bile ^[6]. When the liver or bile ducts have a problem, bilirubin builds up in the blood and gets into the urine ^[6]. MedlinePlus describes dark brown but clear urine as a possible sign of a liver disorder such as acute viral hepatitis or cirrhosis ^[1].

The clues that travel with it are dark urine together with light-colored stool, jaundice (yellow skin or eyes), itching, nausea, tiredness or belly pain ^[6][7]. Bilirubin is not normally found in urine, and finding it can be an early sign of liver damage, sometimes before symptoms ^[6]. For what a positive result means and what comes next, see bilirubin in urine.

Blood: hemoglobin and red blood cells

Pink, red or lighter brown urine can come from bleeding anywhere in the urinary tract, from injury to the kidneys or urinary tract, from a tumor in the bladder or kidneys, or from blood from vaginal bleeding ^[1]. It can also come from hemolytic anemia, where red blood cells break apart in the bloodstream and release hemoglobin ^[1]. MedlinePlus says to see a provider for blood in your urine, even once ^[1]. For how to read a blood result, see what blood in urine test results mean.

Muscle: myoglobin after exertion or injury

Myoglobin is a protein in heart and skeletal muscle. When muscle is damaged, myoglobin is released into the bloodstream and the kidneys filter it into the urine ^[9]. Rhabdomyolysis, the rapid breakdown of muscle tissue, can cause dark, red or cola-colored urine, along with muscle aching, tenderness and weakness, and decreased urine output ^[8].

Severe exertion, such as marathon running or calisthenics, is one of the listed causes, alongside trauma or crush injuries, extremes of body temperature, seizures, certain infections and severe dehydration ^[8]. Myoglobin breaks down into substances that can damage kidney cells, which is why this cause matters ^[8]. Rhabdomyolysis is a major cause of acute kidney injury, and when it is identified early, the outlook for the kidneys is relatively good ^[10].

Foods and supplements that darken urine

Some foods and supplements change urine color without any disease ^[1][2][12]:

• Dark yellow or orange: B complex vitamins, carotene and carrots ^[1][2].
• Red or pink: beets, blackberries and rhubarb ^[2][12].
• Brown: fava beans ^[2][5].
• Brownish-black: some herbal laxatives ^[2].

Medicines can change urine color too, and that change is not a sign of disease ^[12]. If you take a medicine and notice a color change, ask your pharmacist or prescriber whether it explains it rather than stopping it. A color that does not match anything you ate or took, and does not go away, is the one to get checked ^[1].

What dark urine can mean in women

In women, the same causes apply: concentration, bilirubin, blood and muscle protein. The main difference is that blood from the vagina can end up in a urine sample ^[1][11]. Vaginal bleeding is on the MedlinePlus list of causes of pink, red or lighter brown urine ^[1], and blood that looks like it is in the urine may actually come from the vagina ^[11].

Menstrual blood can also make the urinalysis blood test read positive ^[5]. If you are having your period, tell the lab or your provider, or collect the sample once it has finished. MedlinePlus also lists heavy menstrual bleeding or pain with sex alongside blood in the urine as a reason to see your provider, since these may point to a reproductive problem ^[11].

What brown urine can mean in men

In men, the causes are the same, with one male-specific source of blood: the prostate ^[11]. Blood that looks like it is in the urine can come from ejaculation, often because of a prostate problem, and infection or inflammation of the prostate is one of the causes of bloody urine ^[11]. MedlinePlus also flags urinary dribbling, urinating at night or difficulty starting the urine flow as possible prostate signs ^[11].

Brown or cola-colored urine after hard training, together with muscle pain or weakness, points toward myoglobin rather than the prostate ^[8]. That pattern is covered under when to get prompt care.

Dark urine on a urinalysis

A urinalysis separates the causes of dark urine by reading several lines together: color, specific gravity, bilirubin, urobilinogen and blood, plus the red blood cell count from the microscopic exam ^[2][5][12]. Color on its own is only the starting point.

Reading the lines together

The pattern on the report narrows the cause more than any single line:

• Dark yellow, high specific gravity, bilirubin and blood negative: concentrated urine ^[2][4].
• Tea or cola-colored, bilirubin positive: a liver or bile duct cause. A liver function blood test is the next step ^[2][6].
• Red or brown, blood positive, red blood cells present: bleeding somewhere in the urinary tract ^[2][5].
• Red, brown or cola-colored, blood positive, few or no red blood cells: free hemoglobin or myoglobin. With muscle pain after exertion or injury, a CK blood test is the next step ^[5][8][13].

Exercise and dehydration can themselves make the blood line read positive, and vitamin C can make it read falsely negative ^[5]. Samples are most reliable when examined within two hours of collection ^[5].

Urobilinogen and which Mito test reports it

Urobilinogen is made when bilirubin is broken down in the intestine. Some is reabsorbed and a small amount reaches the urine ^[5]. Unlike bilirubin, which points to the liver or bile ducts, a high urobilinogen can also come from red blood cells breaking down, so the two lines together help separate a liver cause from a blood cause ^[2][5].

Not every urinalysis reports it. The Urinalysis, Complete Test with Reflex to Urine Culture reports color, specific gravity, bilirubin and blood, and includes a red blood cell count from the microscopic exam. It does not include a urobilinogen line. The Urinalysis, Routine Test is run at Labcorp and reports urobilinogen along with color, specific gravity, bilirubin and blood. Labcorp performs its microscopic exam, including the red blood cell count, only when the dipstick screen is positive: if protein, leukocyte esterase, blood and nitrite are all negative, only the dipstick results are reported ^[14].

Blood tests that come next

Which blood test comes next depends on the urinalysis pattern and the symptoms that come with the dark urine ^[6][7][8].

Tea or cola-colored urine with pale stools or yellow skin or eyes: a liver function panel. Liver function tests measure several substances made or handled by the liver, including liver enzymes, proteins and bilirubin ^[7]. Dark-colored urine and light-colored stool are among the symptoms MedlinePlus lists as reasons for the test ^[7]. A hepatic function panel covers the core liver chemistries in one draw. Abnormal results usually lead to other tests, because liver function tests alone usually cannot diagnose a specific disease ^[7]. For what each enzyme means, see liver enzymes: ALT, AST, ALP and GGT.

Dark urine after hard exercise, an injury or with muscle pain: creatine kinase (CK). Most CK is in skeletal muscle, and damaged muscle leaks more of it into the blood ^[13]. CK is the most sensitive lab test for muscle injury and is the basis for diagnosing rhabdomyolysis ^[10]. Dark-colored urine is one of the symptoms MedlinePlus lists as a reason for the test ^[13]. CK may not peak until up to two days after an injury, so the test is sometimes repeated ^[13]. For how to read the result, see the creatine kinase blood test.

Blood on the urinalysis with red blood cells: the follow-up depends on the cause your provider suspects. It can include a urine culture, a blood creatinine level, a complete blood count and imaging ^[11].

When to get prompt care for dark urine

Get care right away if dark, red or cola-colored urine comes with muscle pain, weakness or much less urine than usual, especially after very hard exercise, heat or an injury ^[8]. These are symptoms of rhabdomyolysis, and getting treated soon reduces the risk of permanent kidney damage ^[8].

Severe dehydration is a life-threatening emergency ^[3]. Its signs include not urinating, or very dark yellow or amber urine, with dizziness or lightheadedness, a rapid heartbeat, rapid breathing, or irritability or confusion ^[3]. MedlinePlus says to call 911 if a person loses consciousness, becomes confused or has seizures, has a fever over 102°F (38.8°C), shows signs of heatstroke such as a rapid pulse or rapid breathing, or does not improve despite treatment ^[3].

Contact your provider right away for blood in your urine with any of these ^[11]:

• fever, nausea, vomiting or shaking chills;
• pain in your belly, side or back;
• being unable to urinate;
• passing blood clots.

See your provider soon for clear dark-brown urine, pink, red or smoky-brown urine that is not from a food or medicine, or an abnormal color that cannot be explained and does not go away ^[1]. Dark urine with yellow skin or eyes or pale stools belongs here too ^[6][7].

References

1. MedlinePlus. Urine: abnormal color. National Library of Medicine. Reviewed July 1, 2025.
2. Hitzeman N, Greer D, Carpio E. Office-based urinalysis: a comprehensive review. Am Fam Physician. 2022;106(1):27-35B.
3. MedlinePlus. Dehydration. National Library of Medicine. Reviewed July 1, 2025.
4. MedlinePlus. Urine specific gravity test. National Library of Medicine. Reviewed July 13, 2025.
5. Simerville JA, Maxted WC, Pahira JJ. Urinalysis: a comprehensive review. Am Fam Physician. 2005;71(6):1153-1162.
6. MedlinePlus. Bilirubin in urine. National Library of Medicine. Last updated December 2, 2024.
7. MedlinePlus. Liver function tests. National Library of Medicine. Last updated December 5, 2023.
8. MedlinePlus. Rhabdomyolysis. National Library of Medicine. Reviewed September 2, 2025.
9. MedlinePlus. Myoglobin urine test. National Library of Medicine. Reviewed February 13, 2025.
10. Rout P, Chippa V, Adigun R. Rhabdomyolysis. In: StatPearls. StatPearls Publishing; 2025. PMID: 28846335
11. MedlinePlus. Urine: bloody. National Library of Medicine. Reviewed July 1, 2025.
12. MedlinePlus. Urinalysis. National Library of Medicine. Reviewed January 1, 2025.
13. MedlinePlus. Creatine kinase. National Library of Medicine. Last updated October 25, 2023.
14. Labcorp. Urinalysis, routine with microscopic examination on positives (test 003038).
15. National Institute of Diabetes and Digestive and Kidney Diseases. What is kidney failure?
16. National Institute of Diabetes and Digestive and Kidney Diseases. What is chronic kidney disease? Reviewed February 2025.
17. Armstrong LE, Maresh CM, Castellani JW, et al. Urinary indices of hydration status. Int J Sport Nutr. 1994;4(3):265-279. PMID: 7987361

Frequently asked questions

What should I drink if my urine is dark?

If dark yellow urine comes from not drinking enough, water is the usual answer. MedlinePlus suggests sipping water, or drinking water or sports drinks that contain electrolytes, and advises against salt tablets. It also recommends drinking more when the weather is hot or you are exercising, and drinking plenty of fluids after strenuous exercise. If your urine stays dark once you are drinking normally, or it is brown, tea or cola-colored, more fluid is not the answer. Get it checked.

What color is urine when your kidneys are failing?

No single urine color shows kidney failure. Early chronic kidney disease often causes no symptoms, and blood and urine tests are often the only way to find it. In advanced kidney disease, the NIDDK lists foamy urine and a change in how often you urinate, and kidney failure can mean making little or no urine. Failing kidneys also lose the ability to concentrate urine, so specific gravity on a urinalysis can become fixed near 1.010. Dark brown or cola-colored urine with muscle pain after hard exertion can be a sign of muscle breakdown, which can itself damage the kidneys.

Does brown urine mean liver failure?

Not on its own. MedlinePlus says dark brown but clear urine may be a sign of a liver disorder such as acute viral hepatitis or cirrhosis, which puts extra bilirubin in the urine. It can also come from severe dehydration or from muscle breakdown. Bilirubin on a urinalysis and a liver function blood test are what tell these apart. Dark urine with pale stools or yellow skin or eyes is a reason to get those tests soon.

Should I go to the ER for dark brown urine?

Get care right away if dark, red or cola-colored urine follows a crush injury, extreme heat or very hard exercise and comes with muscle pain, weakness or much less urine than usual, because muscle breakdown can damage the kidneys and early treatment lowers that risk. Call 911 for signs of severe dehydration such as confusion, fainting or seizures. MedlinePlus also says to contact a provider right away for blood in the urine with fever, chills, vomiting, or pain in the belly, side or back, if you cannot urinate, or if you pass clots. Clear dark-brown urine without those signs still needs a visit to your provider.