You probably glance at your wee more than you would admit, and for good reason: its colour is one of the simplest clues to how hydrated you may be. This urine colour chart covers each shade, what it might mean, and when to call your GP.
Pale straw to light yellow urine usually suggests you are well hydrated, while dark yellow or amber may mean you need to drink more [1][2]. Pink, red, brown or cola-coloured urine that is not explained by food or medicine should be checked by a GP [3][4].
What colour should your wee be?
The NHS lists dark yellow, strong-smelling pee and peeing less often than usual among the signs of dehydration [1]. Urine colour charts were developed in the 1990s to estimate hydration, and colour tracks reasonably well with daily water intake, though it is only a rough cue rather than a precise test [2][5]. The same balance affects your gut, as our guide to how hydration affects digestion explains, and low fluid is a common contributor to harder stool on the Bristol Stool Chart [6].
| Shade | Colour | What it may mean | What to do |
|---|---|---|---|
| Pale straw or light yellow | Likely well hydrated | Keep going | |
| Dark yellow or amber | May be dehydrated | Drink water and watch it lighten | |
| Bright neon yellow | Often B vitamins in supplements | Usually harmless | |
| Orange | Concentrated urine, some medicines or other causes | Get medical advice if it persists or comes with other symptoms | |
| Pink or red | Beetroot, berries, some medicines, or blood | Urgent GP or 111 if it is not food related | |
| Brown or cola | Severe dehydration, some medicines, liver or muscle problems, or blood | Get it checked promptly |
Shades are approximate and vary by screen. Colour causes summarised from NHS and MedlinePlus guidance [1][3][4].
Why is my wee dark yellow, bright yellow or orange?
Dark yellow usually means concentrated urine: first thing in the morning, after exercise, in heat or after alcohol. Neon yellow is often linked to B vitamins in supplements [4]. Tea and coffee count toward your fluid intake, says the NHS [7], as our guide to coffee and gut health explores. Yellowing skin or eyes, perhaps with darker pee and paler poo than usual, can signal jaundice and needs an urgent GP appointment or a call to 111 [8].
Why is my wee pink, red or brown?
Beetroot can turn urine pink or red in some people [9], and food can change the colour of your poo too, as our stool colour chart shows. But blood in pee can look pink, red or dark brown, and brown or cola-coloured urine may also reflect severe dehydration or liver or muscle problems [3][4].
Ask for an urgent GP appointment or get help from NHS 111 if you have blood in your pee, even if you have no other symptoms, it is the first time, there is only a little, or you are not sure it is blood [3].
The NHS also advises urgent help if you have dark yellow pee or are peeing less than normal, as these can be signs of serious dehydration [1].
How can you use your wee colour day to day?
Glance mid-morning rather than first thing, and notice what shifts it: exercise, travel, heat and drinks. Our pieces on a morning hydration habit and hydration and gut transit time show how these patterns connect, which is the idea behind bathroom health intelligence.
Is completely clear wee a bad sign?
Not usually; it often just means you have drunk plenty, and pale yellow is a perfectly good target. If you feel constantly thirsty despite drinking a lot, or need to pee very often, the NHS suggests seeing a GP [10].
How much water should I drink a day?
The NHS suggests 6 to 8 cups or glasses of fluid a day, including water, lower-fat milk, tea and coffee [7]. Low fluid is also a common factor in midlife constipation, so it pays off twice.
Aim for urine that is usually a pale yellow colour, and treat dark yellow as a nudge to drink. One glance is a snapshot; a pattern tells you more. Gutsi is a gut health tracker that fits any standard toilet in minutes and surfaces hydration alongside consistency and frequency every day, so you can see your patterns over time. Our guide to active vs passive gut tracking explains the difference.
References
- NHS. Dehydration. nhs.uk.
- Armstrong LE, Maresh CM, Castellani JW, et al. Urinary indices of hydration status. International Journal of Sport Nutrition. 1994;4(3):265-279.
- NHS. Blood in urine. nhs.uk.
- MedlinePlus, US National Library of Medicine. Urine: abnormal color.
- Perrier ET, Johnson EC, McKenzie AL, Ellis LA, Armstrong LE. Urine colour change as an indicator of change in daily water intake: a quantitative analysis. European Journal of Nutrition. 2016;55(5):1943-1949.
- NHS. Constipation. nhs.uk.
- NHS. Water, drinks and your health. nhs.uk.
- NHS. Jaundice. nhs.uk.
- StatPearls. Beeturia. National Library of Medicine Bookshelf (NBK537012).
- NHS. Excessive thirst. nhs.uk.
Gutsi provides lifestyle and wellness insights only. It is not intended to diagnose, treat, cure or prevent any disease, and should not be used as a substitute for professional medical advice.
